156974423 has 2 divisors, whose sum is σ = 156974424. Its totient is φ = 156974422.

The previous prime is 156974417. The next prime is 156974429. The reversal of 156974423 is 324479651.

It is a balanced prime because it is at equal distance from previous prime (156974417) and next prime (156974429).

It is an emirp because it is prime and its reverse (324479651) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156974423 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156974429) 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, 78487211 + 78487212.

It is an arithmetic number, because the mean of its divisors is an integer number (78487212).

Almost surely, 2^156974423 is an apocalyptic number.

156974423 is a deficient number, since it is larger than the sum of its proper divisors (1).

156974423 is an equidigital number, since it uses as much as digits as its factorization.

156974423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 41.

The square root of 156974423 is about 12528.9434111580. The cubic root of 156974423 is about 539.4397745023.

The spelling of 156974423 in words is "one hundred fifty-six million, nine hundred seventy-four thousand, four hundred twenty-three".