9390904157 has 2 divisors, whose sum is σ = 9390904158. Its totient is φ = 9390904156.

The previous prime is 9390904139. The next prime is 9390904169. The reversal of 9390904157 is 7514090939.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5074282756 + 4316621401 = 71234^2 + 65701^2 .

It is a cyclic number.

It is not a de Polignac number, because 9390904157 - 2⁶ = 9390904093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9390964157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4695452078 + 4695452079.

It is an arithmetic number, because the mean of its divisors is an integer number (4695452079).

Almost surely, 2^9390904157 is an apocalyptic number.

It is an amenable number.

9390904157 is a deficient number, since it is larger than the sum of its proper divisors (1).

9390904157 is an equidigital number, since it uses as much as digits as its factorization.

9390904157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 306180, while the sum is 47.

The square root of 9390904157 is about 96906.6775666156. The cubic root of 9390904157 is about 2109.7733527883.

The spelling of 9390904157 in words is "nine billion, three hundred ninety million, nine hundred four thousand, one hundred fifty-seven".