157501997 has 2 divisors, whose sum is σ = 157501998. Its totient is φ = 157501996.

The previous prime is 157501969. The next prime is 157502011. The reversal of 157501997 is 799105751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96255721 + 61246276 = 9811^2 + 7826^2 .

It is a cyclic number.

It is not a de Polignac number, because 157501997 - 2⁸ = 157501741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157501937) 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, 78750998 + 78750999.

It is an arithmetic number, because the mean of its divisors is an integer number (78750999).

Almost surely, 2^157501997 is an apocalyptic number.

It is an amenable number.

157501997 is a deficient number, since it is larger than the sum of its proper divisors (1).

157501997 is an equidigital number, since it uses as much as digits as its factorization.

157501997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 99225, while the sum is 44.

The square root of 157501997 is about 12549.9799601434. The cubic root of 157501997 is about 540.0434315776.

The spelling of 157501997 in words is "one hundred fifty-seven million, five hundred one thousand, nine hundred ninety-seven".