129944377 has 2 divisors, whose sum is σ = 129944378. Its totient is φ = 129944376.

The previous prime is 129944371. The next prime is 129944383. The reversal of 129944377 is 773449921.

It is a balanced prime because it is at equal distance from previous prime (129944371) and next prime (129944383).

It can be written as a sum of positive squares in only one way, i.e., 121528576 + 8415801 = 11024^2 + 2901^2 .

It is a cyclic number.

It is not a de Polignac number, because 129944377 - 2³ = 129944369 is a prime.

It is a super-2 number, since 2×129944377² = 33771082227836258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (129944371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64972188 + 64972189.

It is an arithmetic number, because the mean of its divisors is an integer number (64972189).

Almost surely, 2^129944377 is an apocalyptic number.

It is an amenable number.

129944377 is a deficient number, since it is larger than the sum of its proper divisors (1).

129944377 is an equidigital number, since it uses as much as digits as its factorization.

129944377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 46.

The square root of 129944377 is about 11399.3147601073. The cubic root of 129944377 is about 506.5074416473.

It can be divided in two parts, 129944 and 377, that added together give a 4-th power (130321 = 19⁴).

The spelling of 129944377 in words is "one hundred twenty-nine million, nine hundred forty-four thousand, three hundred seventy-seven".