129379387 has 2 divisors, whose sum is σ = 129379388. Its totient is φ = 129379386.

The previous prime is 129379363. The next prime is 129379423. The reversal of 129379387 is 783973921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129379387 - 2⁷ = 129379259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129379387.

It is not a weakly prime, because it can be changed into another prime (129379087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64689693 + 64689694.

It is an arithmetic number, because the mean of its divisors is an integer number (64689694).

Almost surely, 2^129379387 is an apocalyptic number.

129379387 is a deficient number, since it is larger than the sum of its proper divisors (1).

129379387 is an equidigital number, since it uses as much as digits as its factorization.

129379387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 49.

The square root of 129379387 is about 11374.5060112517. The cubic root of 129379387 is about 505.7722876198.

The spelling of 129379387 in words is "one hundred twenty-nine million, three hundred seventy-nine thousand, three hundred eighty-seven".