129712477 has 2 divisors, whose sum is σ = 129712478. Its totient is φ = 129712476.

The previous prime is 129712441. The next prime is 129712537. The reversal of 129712477 is 774217921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108284836 + 21427641 = 10406^2 + 4629^2 .

It is a cyclic number.

It is not a de Polignac number, because 129712477 - 2²³ = 121323869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129712577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64856238 + 64856239.

It is an arithmetic number, because the mean of its divisors is an integer number (64856239).

Almost surely, 2^129712477 is an apocalyptic number.

It is an amenable number.

129712477 is a deficient number, since it is larger than the sum of its proper divisors (1).

129712477 is an equidigital number, since it uses as much as digits as its factorization.

129712477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49392, while the sum is 40.

The square root of 129712477 is about 11389.1385539030. The cubic root of 129712477 is about 506.2059561947.

The spelling of 129712477 in words is "one hundred twenty-nine million, seven hundred twelve thousand, four hundred seventy-seven".