8139525907 has 2 divisors, whose sum is σ = 8139525908. Its totient is φ = 8139525906.

The previous prime is 8139525851. The next prime is 8139525937. The reversal of 8139525907 is 7095259318.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8139525907 - 2¹¹ = 8139523859 is a prime.

It is not a weakly prime, because it can be changed into another prime (8139525937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4069762953 + 4069762954.

It is an arithmetic number, because the mean of its divisors is an integer number (4069762954).

Almost surely, 2^8139525907 is an apocalyptic number.

8139525907 is a deficient number, since it is larger than the sum of its proper divisors (1).

8139525907 is an equidigital number, since it uses as much as digits as its factorization.

8139525907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 680400, while the sum is 49.

The square root of 8139525907 is about 90219.3211402081. The cubic root of 8139525907 is about 2011.5602109375.

The spelling of 8139525907 in words is "eight billion, one hundred thirty-nine million, five hundred twenty-five thousand, nine hundred seven".