129139077 has 16 divisors (see below), whose sum is σ = 174343680. Its totient is φ = 85020672.

The previous prime is 129139069. The next prime is 129139079. The reversal of 129139077 is 770931921.

It is not a de Polignac number, because 129139077 - 2³ = 129139069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129139079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90949 + ... + 92357.

It is an arithmetic number, because the mean of its divisors is an integer number (10896480).

Almost surely, 2^129139077 is an apocalyptic number.

It is an amenable number.

129139077 is a deficient number, since it is larger than the sum of its proper divisors (45204603).

129139077 is a wasteful number, since it uses less digits than its factorization.

129139077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1772.

The product of its (nonzero) digits is 23814, while the sum is 39.

The square root of 129139077 is about 11363.9375658264. The cubic root of 129139077 is about 505.4589521135.

The spelling of 129139077 in words is "one hundred twenty-nine million, one hundred thirty-nine thousand, seventy-seven".