129579077 has 2 divisors, whose sum is σ = 129579078. Its totient is φ = 129579076.

The previous prime is 129579041. The next prime is 129579089. The reversal of 129579077 is 770975921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84070561 + 45508516 = 9169^2 + 6746^2 .

It is a cyclic number.

It is not a de Polignac number, because 129579077 - 2⁶ = 129579013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129579277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64789538 + 64789539.

It is an arithmetic number, because the mean of its divisors is an integer number (64789539).

Almost surely, 2^129579077 is an apocalyptic number.

It is an amenable number.

129579077 is a deficient number, since it is larger than the sum of its proper divisors (1).

129579077 is an equidigital number, since it uses as much as digits as its factorization.

129579077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 277830, while the sum is 47.

The square root of 129579077 is about 11383.2805904098. The cubic root of 129579077 is about 506.0323644721.

The spelling of 129579077 in words is "one hundred twenty-nine million, five hundred seventy-nine thousand, seventy-seven".