159780939 has 4 divisors (see below), whose sum is σ = 213041256. Its totient is φ = 106520624.

The previous prime is 159780919. The next prime is 159780947. The reversal of 159780939 is 939087951.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 939087951 = 3 ⋅313029317.

It is a cyclic number.

It is not a de Polignac number, because 159780939 - 2¹³ = 159772747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 159780891 and 159780900.

It is not an unprimeable number, because it can be changed into a prime (159780919) 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, 26630154 + ... + 26630159.

It is an arithmetic number, because the mean of its divisors is an integer number (53260314).

Almost surely, 2^159780939 is an apocalyptic number.

159780939 is a deficient number, since it is larger than the sum of its proper divisors (53260317).

159780939 is an equidigital number, since it uses as much as digits as its factorization.

159780939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53260316.

The product of its (nonzero) digits is 612360, while the sum is 51.

The square root of 159780939 is about 12640.4485284344. The cubic root of 159780939 is about 542.6356505621.

The spelling of 159780939 in words is "one hundred fifty-nine million, seven hundred eighty thousand, nine hundred thirty-nine".