15791957 has 2 divisors, whose sum is σ = 15791958. Its totient is φ = 15791956.

The previous prime is 15791911. The next prime is 15791969. The reversal of 15791957 is 75919751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14432401 + 1359556 = 3799^2 + 1166^2 .

It is an emirp because it is prime and its reverse (75919751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15791957 - 2¹⁶ = 15726421 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15791977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7895978 + 7895979.

It is an arithmetic number, because the mean of its divisors is an integer number (7895979).

Almost surely, 2^15791957 is an apocalyptic number.

It is an amenable number.

15791957 is a deficient number, since it is larger than the sum of its proper divisors (1).

15791957 is an equidigital number, since it uses as much as digits as its factorization.

15791957 is an odious number, because the sum of its binary digits is odd.

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

The square root of 15791957 is about 3973.9095359608. The cubic root of 15791957 is about 250.8872845126.

The spelling of 15791957 in words is "fifteen million, seven hundred ninety-one thousand, nine hundred fifty-seven".