156872993 has 8 divisors (see below), whose sum is σ = 158160288. Its totient is φ = 155589984.

The previous prime is 156872971. The next prime is 156873001. The reversal of 156872993 is 399278651.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156872993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156472993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139130 + ... + 140252.

It is an arithmetic number, because the mean of its divisors is an integer number (19770036).

Almost surely, 2^156872993 is an apocalyptic number.

It is an amenable number.

156872993 is a deficient number, since it is larger than the sum of its proper divisors (1287295).

156872993 is a wasteful number, since it uses less digits than its factorization.

156872993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2143.

The product of its digits is 816480, while the sum is 50.

The square root of 156872993 is about 12524.8949296990. The cubic root of 156872993 is about 539.3235620128.

The spelling of 156872993 in words is "one hundred fifty-six million, eight hundred seventy-two thousand, nine hundred ninety-three".