157243579 has 2 divisors, whose sum is σ = 157243580. Its totient is φ = 157243578.

The previous prime is 157243553. The next prime is 157243589. The reversal of 157243579 is 975342751.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 157243579 - 2⁵ = 157243547 is a prime.

It is not a weakly prime, because it can be changed into another prime (157243519) 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, 78621789 + 78621790.

It is an arithmetic number, because the mean of its divisors is an integer number (78621790).

Almost surely, 2^157243579 is an apocalyptic number.

157243579 is a deficient number, since it is larger than the sum of its proper divisors (1).

157243579 is an equidigital number, since it uses as much as digits as its factorization.

157243579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 264600, while the sum is 43.

The square root of 157243579 is about 12539.6801793347. The cubic root of 157243579 is about 539.7479150322.

The spelling of 157243579 in words is "one hundred fifty-seven million, two hundred forty-three thousand, five hundred seventy-nine".