157499317 has 2 divisors, whose sum is σ = 157499318. Its totient is φ = 157499316.

The previous prime is 157499281. The next prime is 157499323. The reversal of 157499317 is 713994751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157101156 + 398161 = 12534^2 + 631^2 .

It is an emirp because it is prime and its reverse (713994751) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157499317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157499717) 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, 78749658 + 78749659.

It is an arithmetic number, because the mean of its divisors is an integer number (78749659).

Almost surely, 2^157499317 is an apocalyptic number.

It is an amenable number.

157499317 is a deficient number, since it is larger than the sum of its proper divisors (1).

157499317 is an equidigital number, since it uses as much as digits as its factorization.

157499317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 238140, while the sum is 46.

The square root of 157499317 is about 12549.8731866103. The cubic root of 157499317 is about 540.0403684956.

The spelling of 157499317 in words is "one hundred fifty-seven million, four hundred ninety-nine thousand, three hundred seventeen".