13157797 has 2 divisors, whose sum is σ = 13157798. Its totient is φ = 13157796.

The previous prime is 13157789. The next prime is 13157801. The reversal of 13157797 is 79775131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10850436 + 2307361 = 3294^2 + 1519^2 .

It is an emirp because it is prime and its reverse (79775131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13157797 - 2³ = 13157789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13157737) 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, 6578898 + 6578899.

It is an arithmetic number, because the mean of its divisors is an integer number (6578899).

Almost surely, 2^13157797 is an apocalyptic number.

It is an amenable number.

13157797 is a deficient number, since it is larger than the sum of its proper divisors (1).

13157797 is an equidigital number, since it uses as much as digits as its factorization.

13157797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46305, while the sum is 40.

The square root of 13157797 is about 3627.3677784311. The cubic root of 13157797 is about 236.0810133149.

The spelling of 13157797 in words is "thirteen million, one hundred fifty-seven thousand, seven hundred ninety-seven".