156990074 has 4 divisors (see below), whose sum is σ = 235485114. Its totient is φ = 78495036.

The previous prime is 156990073. The next prime is 156990083. The reversal of 156990074 is 470099651.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 470099651 = 7 ⋅67157093.

It can be written as a sum of positive squares in only one way, i.e., 137053849 + 19936225 = 11707^2 + 4465^2 .

It is not an unprimeable number, because it can be changed into a prime (156990073) by changing a digit.

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 as a sum of consecutive naturals, namely, 39247517 + ... + 39247520.

Almost surely, 2^156990074 is an apocalyptic number.

156990074 is a deficient number, since it is larger than the sum of its proper divisors (78495040).

156990074 is an equidigital number, since it uses as much as digits as its factorization.

156990074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78495039.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 156990074 is about 12529.5679893602. The cubic root of 156990074 is about 539.4577020329.

The spelling of 156990074 in words is "one hundred fifty-six million, nine hundred ninety thousand, seventy-four".