129713861 has 2 divisors, whose sum is σ = 129713862. Its totient is φ = 129713860.

The previous prime is 129713849. The next prime is 129713953. The reversal of 129713861 is 168317921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88830625 + 40883236 = 9425^2 + 6394^2 .

It is a cyclic number.

It is not a de Polignac number, because 129713861 - 2⁶ = 129713797 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p_7362947 and since 129713861 and 7362947 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129713821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64856930 + 64856931.

It is an arithmetic number, because the mean of its divisors is an integer number (64856931).

Almost surely, 2^129713861 is an apocalyptic number.

It is an amenable number.

129713861 is a deficient number, since it is larger than the sum of its proper divisors (1).

129713861 is an equidigital number, since it uses as much as digits as its factorization.

129713861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 38.

The square root of 129713861 is about 11389.1993133846. The cubic root of 129713861 is about 506.2077565524.

The spelling of 129713861 in words is "one hundred twenty-nine million, seven hundred thirteen thousand, eight hundred sixty-one".