157839457 has 2 divisors, whose sum is σ = 157839458. Its totient is φ = 157839456.

The previous prime is 157839449. The next prime is 157839499. The reversal of 157839457 is 754938751.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151880976 + 5958481 = 12324^2 + 2441^2 .

It is a cyclic number.

It is not a de Polignac number, because 157839457 - 2³ = 157839449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 157839457.

It is not a weakly prime, because it can be changed into another prime (157839427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78919728 + 78919729.

It is an arithmetic number, because the mean of its divisors is an integer number (78919729).

Almost surely, 2^157839457 is an apocalyptic number.

It is an amenable number.

157839457 is a deficient number, since it is larger than the sum of its proper divisors (1).

157839457 is an equidigital number, since it uses as much as digits as its factorization.

157839457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1058400, while the sum is 49.

The square root of 157839457 is about 12563.4174092880. The cubic root of 157839457 is about 540.4288511449.

The spelling of 157839457 in words is "one hundred fifty-seven million, eight hundred thirty-nine thousand, four hundred fifty-seven".