157982399 has 2 divisors, whose sum is σ = 157982400. Its totient is φ = 157982398.

The previous prime is 157982381. The next prime is 157982413. The reversal of 157982399 is 993289751.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157982399 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 157982399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157982299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78991199 + 78991200.

It is an arithmetic number, because the mean of its divisors is an integer number (78991200).

Almost surely, 2^157982399 is an apocalyptic number.

157982399 is a deficient number, since it is larger than the sum of its proper divisors (1).

157982399 is an equidigital number, since it uses as much as digits as its factorization.

157982399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224720, while the sum is 53.

The square root of 157982399 is about 12569.1049402891. The cubic root of 157982399 is about 540.5919423314.

The spelling of 157982399 in words is "one hundred fifty-seven million, nine hundred eighty-two thousand, three hundred ninety-nine".