915961957 has 2 divisors, whose sum is σ = 915961958. Its totient is φ = 915961956.

The previous prime is 915961939. The next prime is 915961967. The reversal of 915961957 is 759169519.

915961957 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 659513761 + 256448196 = 25681^2 + 16014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-915961957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (915961967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 457980978 + 457980979.

It is an arithmetic number, because the mean of its divisors is an integer number (457980979).

Almost surely, 2^915961957 is an apocalyptic number.

It is an amenable number.

915961957 is a deficient number, since it is larger than the sum of its proper divisors (1).

915961957 is an equidigital number, since it uses as much as digits as its factorization.

915961957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 765450, while the sum is 52.

The square root of 915961957 is about 30264.8634062670. The cubic root of 915961957 is about 971.1637843685.

The spelling of 915961957 in words is "nine hundred fifteen million, nine hundred sixty-one thousand, nine hundred fifty-seven".