139869907 has 2 divisors, whose sum is σ = 139869908. Its totient is φ = 139869906.

The previous prime is 139869883. The next prime is 139869911. The reversal of 139869907 is 709968931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139869907 - 2¹¹ = 139867859 is a prime.

It is not a weakly prime, because it can be changed into another prime (139869607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69934953 + 69934954.

It is an arithmetic number, because the mean of its divisors is an integer number (69934954).

Almost surely, 2^139869907 is an apocalyptic number.

139869907 is a deficient number, since it is larger than the sum of its proper divisors (1).

139869907 is an equidigital number, since it uses as much as digits as its factorization.

139869907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 734832, while the sum is 52.

The square root of 139869907 is about 11826.6608558798. The cubic root of 139869907 is about 519.0885253093.

The spelling of 139869907 in words is "one hundred thirty-nine million, eight hundred sixty-nine thousand, nine hundred seven".