129877137 has 12 divisors (see below), whose sum is σ = 202031284. Its totient is φ = 79924320.

The previous prime is 129877117. The next prime is 129877169. The reversal of 129877137 is 731778921.

It can be written as a sum of positive squares in 2 ways, for example, as 25040016 + 104837121 = 5004^2 + 10239^2 .

It is not a de Polignac number, because 129877137 - 2⁷ = 129877009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129877092 and 129877101.

It is not an unprimeable number, because it can be changed into a prime (129877117) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 554914 + ... + 555147.

Almost surely, 2^129877137 is an apocalyptic number.

It is an amenable number.

129877137 is a deficient number, since it is larger than the sum of its proper divisors (72154147).

129877137 is a wasteful number, since it uses less digits than its factorization.

129877137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110080 (or 1110077 counting only the distinct ones).

The product of its digits is 148176, while the sum is 45.

The square root of 129877137 is about 11396.3650783923. The cubic root of 129877137 is about 506.4200621156.

The spelling of 129877137 in words is "one hundred twenty-nine million, eight hundred seventy-seven thousand, one hundred thirty-seven".