129276377 has 2 divisors, whose sum is σ = 129276378. Its totient is φ = 129276376.

The previous prime is 129276373. The next prime is 129276383. The reversal of 129276377 is 773672921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120538441 + 8737936 = 10979^2 + 2956^2 .

It is a cyclic number.

It is not a de Polignac number, because 129276377 - 2² = 129276373 is a prime.

It is a super-2 number, since 2×129276377² = 33424763300492258, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (129276373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64638188 + 64638189.

It is an arithmetic number, because the mean of its divisors is an integer number (64638189).

Almost surely, 2^129276377 is an apocalyptic number.

It is an amenable number.

129276377 is a deficient number, since it is larger than the sum of its proper divisors (1).

129276377 is an equidigital number, since it uses as much as digits as its factorization.

129276377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 222264, while the sum is 44.

The square root of 129276377 is about 11369.9770008562. The cubic root of 129276377 is about 505.6380224491.

The spelling of 129276377 in words is "one hundred twenty-nine million, two hundred seventy-six thousand, three hundred seventy-seven".