159769945 has 4 divisors (see below), whose sum is σ = 191723940. Its totient is φ = 127815952.

The previous prime is 159769943. The next prime is 159769949. The reversal of 159769945 is 549967951.

159769945 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: 549967951 = 13 ⋅42305227.

It can be written as a sum of positive squares in 2 ways, for example, as 60886809 + 98883136 = 7803^2 + 9944^2 .

It is a cyclic number.

It is not a de Polignac number, because 159769945 - 2¹ = 159769943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (159769943) 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, 15976990 + ... + 15976999.

It is an arithmetic number, because the mean of its divisors is an integer number (47930985).

Almost surely, 2^159769945 is an apocalyptic number.

It is an amenable number.

159769945 is a deficient number, since it is larger than the sum of its proper divisors (31953995).

159769945 is an equidigital number, since it uses as much as digits as its factorization.

159769945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31953994.

The product of its digits is 3061800, while the sum is 55.

The square root of 159769945 is about 12640.0136471445. The cubic root of 159769945 is about 542.6232046196.

It can be divided in two parts, 15976 and 9945, that added together give a square (25921 = 161²).

The spelling of 159769945 in words is "one hundred fifty-nine million, seven hundred sixty-nine thousand, nine hundred forty-five".