156989473 has 8 divisors (see below), whose sum is σ = 158037440. Its totient is φ = 155945520.

The previous prime is 156989429. The next prime is 156989489. The reversal of 156989473 is 374989651.

It is a happy number.

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-156989473 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 156989473.

It is not an unprimeable number, because it can be changed into a prime (156929473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120958 + ... + 122248.

It is an arithmetic number, because the mean of its divisors is an integer number (19754680).

Almost surely, 2^156989473 is an apocalyptic number.

It is an amenable number.

156989473 is a deficient number, since it is larger than the sum of its proper divisors (1047967).

156989473 is a wasteful number, since it uses less digits than its factorization.

156989473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2007.

The product of its digits is 1632960, while the sum is 52.

The square root of 156989473 is about 12529.5440060682. The cubic root of 156989473 is about 539.4570136359.

The spelling of 156989473 in words is "one hundred fifty-six million, nine hundred eighty-nine thousand, four hundred seventy-three".