157259491 has 2 divisors, whose sum is σ = 157259492. Its totient is φ = 157259490.

The previous prime is 157259437. The next prime is 157259507. The reversal of 157259491 is 194952751.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 157259491 - 2⁷ = 157259363 is a prime.

It is not a weakly prime, because it can be changed into another prime (157257491) 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, 78629745 + 78629746.

It is an arithmetic number, because the mean of its divisors is an integer number (78629746).

Almost surely, 2^157259491 is an apocalyptic number.

157259491 is a deficient number, since it is larger than the sum of its proper divisors (1).

157259491 is an equidigital number, since it uses as much as digits as its factorization.

157259491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113400, while the sum is 43.

The square root of 157259491 is about 12540.3146292268. The cubic root of 157259491 is about 539.7661207128.

The spelling of 157259491 in words is "one hundred fifty-seven million, two hundred fifty-nine thousand, four hundred ninety-one".