156980459 has 4 divisors (see below), whose sum is σ = 157492104. Its totient is φ = 156468816.

The previous prime is 156980429. The next prime is 156980471. The reversal of 156980459 is 954089651.

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: 954089651 = 1301 ⋅733351.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156980459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156980419) 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, 255362 + ... + 255975.

It is an arithmetic number, because the mean of its divisors is an integer number (39373026).

Almost surely, 2^156980459 is an apocalyptic number.

156980459 is a deficient number, since it is larger than the sum of its proper divisors (511645).

156980459 is an equidigital number, since it uses as much as digits as its factorization.

156980459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511644.

The product of its (nonzero) digits is 388800, while the sum is 47.

The square root of 156980459 is about 12529.1842910862. The cubic root of 156980459 is about 539.4466886154.

It can be divided in two parts, 1569 and 80459, that added together give a palindrome (82028).

The spelling of 156980459 in words is "one hundred fifty-six million, nine hundred eighty thousand, four hundred fifty-nine".