129339377 has 2 divisors, whose sum is σ = 129339378. Its totient is φ = 129339376.

The previous prime is 129339367. The next prime is 129339421. The reversal of 129339377 is 773933921.

It is an a-pointer prime, because the next prime (129339421) can be obtained adding 129339377 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127599616 + 1739761 = 11296^2 + 1319^2 .

It is a cyclic number.

It is not a de Polignac number, because 129339377 - 2¹² = 129335281 is a prime.

It is not a weakly prime, because it can be changed into another prime (129339367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64669688 + 64669689.

It is an arithmetic number, because the mean of its divisors is an integer number (64669689).

Almost surely, 2^129339377 is an apocalyptic number.

It is an amenable number.

129339377 is a deficient number, since it is larger than the sum of its proper divisors (1).

129339377 is an equidigital number, since it uses as much as digits as its factorization.

129339377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 214326, while the sum is 44.

The square root of 129339377 is about 11372.7471175614. The cubic root of 129339377 is about 505.7201463011.

The spelling of 129339377 in words is "one hundred twenty-nine million, three hundred thirty-nine thousand, three hundred seventy-seven".