139429877 has 2 divisors, whose sum is σ = 139429878. Its totient is φ = 139429876.

The previous prime is 139429867. The next prime is 139429943. The reversal of 139429877 is 778924931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110796676 + 28633201 = 10526^2 + 5351^2 .

It is a cyclic number.

It is not a de Polignac number, because 139429877 - 2⁸ = 139429621 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 (139429867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69714938 + 69714939.

It is an arithmetic number, because the mean of its divisors is an integer number (69714939).

Almost surely, 2^139429877 is an apocalyptic number.

It is an amenable number.

139429877 is a deficient number, since it is larger than the sum of its proper divisors (1).

139429877 is an equidigital number, since it uses as much as digits as its factorization.

139429877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 50.

The square root of 139429877 is about 11808.0428945698. The cubic root of 139429877 is about 518.5436035352.

The spelling of 139429877 in words is "one hundred thirty-nine million, four hundred twenty-nine thousand, eight hundred seventy-seven".