129319807 has 2 divisors, whose sum is σ = 129319808. Its totient is φ = 129319806.

The previous prime is 129319769. The next prime is 129319859. The reversal of 129319807 is 708913921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129319807 - 2⁷ = 129319679 is a prime.

It is a super-2 number, since 2×129319807² = 33447224965034498, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 129319807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129319007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64659903 + 64659904.

It is an arithmetic number, because the mean of its divisors is an integer number (64659904).

Almost surely, 2^129319807 is an apocalyptic number.

129319807 is a deficient number, since it is larger than the sum of its proper divisors (1).

129319807 is an equidigital number, since it uses as much as digits as its factorization.

129319807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 129319807 is about 11371.8866948277. The cubic root of 129319807 is about 505.6946386207.

The spelling of 129319807 in words is "one hundred twenty-nine million, three hundred nineteen thousand, eight hundred seven".