156997054 has 8 divisors (see below), whose sum is σ = 235915560. Its totient is φ = 78358536.

The previous prime is 156997007. The next prime is 156997063. The reversal of 156997054 is 450799651.

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

It is a junction number, because it is equal to n+sod(n) for n = 156996995 and 156997013.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68589 + ... + 70840.

It is an arithmetic number, because the mean of its divisors is an integer number (29489445).

Almost surely, 2^156997054 is an apocalyptic number.

156997054 is a deficient number, since it is larger than the sum of its proper divisors (78918506).

156997054 is a wasteful number, since it uses less digits than its factorization.

156997054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139994.

The product of its (nonzero) digits is 340200, while the sum is 46.

The square root of 156997054 is about 12529.8465273921. The cubic root of 156997054 is about 539.4656969311.

The spelling of 156997054 in words is "one hundred fifty-six million, nine hundred ninety-seven thousand, fifty-four".