139129877 has 2 divisors, whose sum is σ = 139129878. Its totient is φ = 139129876.

The previous prime is 139129867. The next prime is 139129901. The reversal of 139129877 is 778921931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134351281 + 4778596 = 11591^2 + 2186^2 .

It is a cyclic number.

It is not a de Polignac number, because 139129877 - 2¹⁸ = 138867733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139129867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69564938 + 69564939.

It is an arithmetic number, because the mean of its divisors is an integer number (69564939).

Almost surely, 2^139129877 is an apocalyptic number.

It is an amenable number.

139129877 is a deficient number, since it is larger than the sum of its proper divisors (1).

139129877 is an equidigital number, since it uses as much as digits as its factorization.

139129877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 47.

The square root of 139129877 is about 11795.3328482074. The cubic root of 139129877 is about 518.1714336942.

The spelling of 139129877 in words is "one hundred thirty-nine million, one hundred twenty-nine thousand, eight hundred seventy-seven".