139462913 has 2 divisors, whose sum is σ = 139462914. Its totient is φ = 139462912.

The previous prime is 139462909. The next prime is 139462919. The reversal of 139462913 is 319264931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135652609 + 3810304 = 11647^2 + 1952^2 .

It is an emirp because it is prime and its reverse (319264931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139462913 - 2² = 139462909 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (139462919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69731456 + 69731457.

It is an arithmetic number, because the mean of its divisors is an integer number (69731457).

Almost surely, 2^139462913 is an apocalyptic number.

It is an amenable number.

139462913 is a deficient number, since it is larger than the sum of its proper divisors (1).

139462913 is an equidigital number, since it uses as much as digits as its factorization.

139462913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 38.

The square root of 139462913 is about 11809.4416887506. The cubic root of 139462913 is about 518.5845542364.

The spelling of 139462913 in words is "one hundred thirty-nine million, four hundred sixty-two thousand, nine hundred thirteen".