156704947 has 4 divisors (see below), whose sum is σ = 179091376. Its totient is φ = 134318520.

The previous prime is 156704927. The next prime is 156704971. The reversal of 156704947 is 749407651.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-156704947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156704917) 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 3 ways as a sum of consecutive naturals, for example, 11193204 + ... + 11193217.

It is an arithmetic number, because the mean of its divisors is an integer number (44772844).

Almost surely, 2^156704947 is an apocalyptic number.

156704947 is a deficient number, since it is larger than the sum of its proper divisors (22386429).

156704947 is an equidigital number, since it uses as much as digits as its factorization.

156704947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22386428.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 156704947 is about 12518.1846527362. The cubic root of 156704947 is about 539.1309145576.

The spelling of 156704947 in words is "one hundred fifty-six million, seven hundred four thousand, nine hundred forty-seven".