9913151957 has 2 divisors, whose sum is σ = 9913151958. Its totient is φ = 9913151956.

The previous prime is 9913151953. The next prime is 9913151981. The reversal of 9913151957 is 7591513199.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8783250961 + 1129900996 = 93719^2 + 33614^2 .

It is an emirp because it is prime and its reverse (7591513199) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9913151957 - 2² = 9913151953 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9913151951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4956575978 + 4956575979.

It is an arithmetic number, because the mean of its divisors is an integer number (4956575979).

Almost surely, 2^9913151957 is an apocalyptic number.

It is an amenable number.

9913151957 is a deficient number, since it is larger than the sum of its proper divisors (1).

9913151957 is an equidigital number, since it uses as much as digits as its factorization.

9913151957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 382725, while the sum is 50.

The square root of 9913151957 is about 99564.8128457037. The cubic root of 9913151957 is about 2148.1795989642.

The spelling of 9913151957 in words is "nine billion, nine hundred thirteen million, one hundred fifty-one thousand, nine hundred fifty-seven".