159722957 has 4 divisors (see below), whose sum is σ = 160888956. Its totient is φ = 158556960.

The previous prime is 159722951. The next prime is 159722963. The reversal of 159722957 is 759227951.

It is a happy number.

159722957 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 759227951 = 21149 ⋅35899.

It is an interprime number because it is at equal distance from previous prime (159722951) and next prime (159722963).

It can be written as a sum of positive squares in 2 ways, for example, as 84015556 + 75707401 = 9166^2 + 8701^2 .

It is a cyclic number.

It is not a de Polignac number, because 159722957 - 2¹² = 159718861 is a prime.

It is a super-2 number, since 2×159722957² = 51022845985647698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159722951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 582794 + ... + 583067.

It is an arithmetic number, because the mean of its divisors is an integer number (40222239).

Almost surely, 2^159722957 is an apocalyptic number.

It is an amenable number.

159722957 is a deficient number, since it is larger than the sum of its proper divisors (1165999).

159722957 is a wasteful number, since it uses less digits than its factorization.

159722957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1165998.

The product of its digits is 396900, while the sum is 47.

The square root of 159722957 is about 12638.1548099396. The cubic root of 159722957 is about 542.5700046282.

The spelling of 159722957 in words is "one hundred fifty-nine million, seven hundred twenty-two thousand, nine hundred fifty-seven".