156928091 has 2 divisors, whose sum is σ = 156928092. Its totient is φ = 156928090.

The previous prime is 156928073. The next prime is 156928097. The reversal of 156928091 is 190829651.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (190829651) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 156928091 - 2¹⁸ = 156665947 is a prime.

It is not a weakly prime, because it can be changed into another prime (156928097) 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 as a sum of consecutive naturals, namely, 78464045 + 78464046.

It is an arithmetic number, because the mean of its divisors is an integer number (78464046).

Almost surely, 2^156928091 is an apocalyptic number.

156928091 is a deficient number, since it is larger than the sum of its proper divisors (1).

156928091 is an equidigital number, since it uses as much as digits as its factorization.

156928091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 41.

The square root of 156928091 is about 12527.0942760083. The cubic root of 156928091 is about 539.3866962523.

The spelling of 156928091 in words is "one hundred fifty-six million, nine hundred twenty-eight thousand, ninety-one".