139869911 has 2 divisors, whose sum is σ = 139869912. Its totient is φ = 139869910.

The previous prime is 139869907. The next prime is 139869991. The reversal of 139869911 is 119968931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139869911 - 2² = 139869907 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139869991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69934955 + 69934956.

It is an arithmetic number, because the mean of its divisors is an integer number (69934956).

Almost surely, 2^139869911 is an apocalyptic number.

139869911 is a deficient number, since it is larger than the sum of its proper divisors (1).

139869911 is an equidigital number, since it uses as much as digits as its factorization.

139869911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104976, while the sum is 47.

The square root of 139869911 is about 11826.6610249893. The cubic root of 139869911 is about 519.0885302576.

The spelling of 139869911 in words is "one hundred thirty-nine million, eight hundred sixty-nine thousand, nine hundred eleven".