139969877 has 2 divisors, whose sum is σ = 139969878. Its totient is φ = 139969876.

The previous prime is 139969871. The next prime is 139969931. The reversal of 139969877 is 778969931.

139969877 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137686756 + 2283121 = 11734^2 + 1511^2 .

It is a cyclic number.

It is not a de Polignac number, because 139969877 - 2⁶ = 139969813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139969871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69984938 + 69984939.

It is an arithmetic number, because the mean of its divisors is an integer number (69984939).

Almost surely, 2^139969877 is an apocalyptic number.

It is an amenable number.

139969877 is a deficient number, since it is larger than the sum of its proper divisors (1).

139969877 is an equidigital number, since it uses as much as digits as its factorization.

139969877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5143824, while the sum is 59.

The square root of 139969877 is about 11830.8865686389. The cubic root of 139969877 is about 519.2121662043.

The spelling of 139969877 in words is "one hundred thirty-nine million, nine hundred sixty-nine thousand, eight hundred seventy-seven".