129942677 has 2 divisors, whose sum is σ = 129942678. Its totient is φ = 129942676.

The previous prime is 129942667. The next prime is 129942737. The reversal of 129942677 is 776249921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129937201 + 5476 = 11399^2 + 74^2 .

It is a cyclic number.

It is not a de Polignac number, because 129942677 - 2⁶ = 129942613 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 (129942667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64971338 + 64971339.

It is an arithmetic number, because the mean of its divisors is an integer number (64971339).

Almost surely, 2^129942677 is an apocalyptic number.

It is an amenable number.

129942677 is a deficient number, since it is larger than the sum of its proper divisors (1).

129942677 is an equidigital number, since it uses as much as digits as its factorization.

129942677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 47.

The square root of 129942677 is about 11399.2401939778. The cubic root of 129942677 is about 506.5052328397.

The spelling of 129942677 in words is "one hundred twenty-nine million, nine hundred forty-two thousand, six hundred seventy-seven".