139464917 has 2 divisors, whose sum is σ = 139464918. Its totient is φ = 139464916.

The previous prime is 139464907. The next prime is 139464979. The reversal of 139464917 is 719464931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130667761 + 8797156 = 11431^2 + 2966^2 .

It is a cyclic number.

It is not a de Polignac number, because 139464917 - 2¹⁰ = 139463893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139464907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69732458 + 69732459.

It is an arithmetic number, because the mean of its divisors is an integer number (69732459).

Almost surely, 2^139464917 is an apocalyptic number.

It is an amenable number.

139464917 is a deficient number, since it is larger than the sum of its proper divisors (1).

139464917 is an equidigital number, since it uses as much as digits as its factorization.

139464917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 44.

The square root of 139464917 is about 11809.5265358100. The cubic root of 139464917 is about 518.5870381428.

The spelling of 139464917 in words is "one hundred thirty-nine million, four hundred sixty-four thousand, nine hundred seventeen".