139269709 has 2 divisors, whose sum is σ = 139269710. Its totient is φ = 139269708.

The previous prime is 139269703. The next prime is 139269719. The reversal of 139269709 is 907962931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83722500 + 55547209 = 9150^2 + 7453^2 .

It is a cyclic number.

It is not a de Polignac number, because 139269709 - 2⁹ = 139269197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139269703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69634854 + 69634855.

It is an arithmetic number, because the mean of its divisors is an integer number (69634855).

Almost surely, 2^139269709 is an apocalyptic number.

It is an amenable number.

139269709 is a deficient number, since it is larger than the sum of its proper divisors (1).

139269709 is an equidigital number, since it uses as much as digits as its factorization.

139269709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 183708, while the sum is 46.

The square root of 139269709 is about 11801.2587887903. The cubic root of 139269709 is about 518.3449710364.

The spelling of 139269709 in words is "one hundred thirty-nine million, two hundred sixty-nine thousand, seven hundred nine".