157619797 has 2 divisors, whose sum is σ = 157619798. Its totient is φ = 157619796.

The previous prime is 157619789. The next prime is 157619807. The reversal of 157619797 is 797916751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94750756 + 62869041 = 9734^2 + 7929^2 .

It is a cyclic number.

It is not a de Polignac number, because 157619797 - 2³ = 157619789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157619747) 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, 78809898 + 78809899.

It is an arithmetic number, because the mean of its divisors is an integer number (78809899).

Almost surely, 2^157619797 is an apocalyptic number.

It is an amenable number.

157619797 is a deficient number, since it is larger than the sum of its proper divisors (1).

157619797 is an equidigital number, since it uses as much as digits as its factorization.

157619797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 833490, while the sum is 52.

The square root of 157619797 is about 12554.6723175079. The cubic root of 157619797 is about 540.1780357175.

The spelling of 157619797 in words is "one hundred fifty-seven million, six hundred nineteen thousand, seven hundred ninety-seven".