139338907 has 2 divisors, whose sum is σ = 139338908. Its totient is φ = 139338906.

The previous prime is 139338889. The next prime is 139338917. The reversal of 139338907 is 709833931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139338907 - 2⁷ = 139338779 is a prime.

It is not a weakly prime, because it can be changed into another prime (139338917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69669453 + 69669454.

It is an arithmetic number, because the mean of its divisors is an integer number (69669454).

Almost surely, 2^139338907 is an apocalyptic number.

139338907 is a deficient number, since it is larger than the sum of its proper divisors (1).

139338907 is an equidigital number, since it uses as much as digits as its factorization.

139338907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 139338907 is about 11804.1902305918. The cubic root of 139338907 is about 518.4308056773.

The spelling of 139338907 in words is "one hundred thirty-nine million, three hundred thirty-eight thousand, nine hundred seven".