129760407 has 16 divisors (see below), whose sum is σ = 219700480. Its totient is φ = 74148696.

The previous prime is 129760403. The next prime is 129760409. The reversal of 129760407 is 704067921.

It is a happy number.

It is not a de Polignac number, because 129760407 - 2² = 129760403 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129760403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 343093 + ... + 343470.

It is an arithmetic number, because the mean of its divisors is an integer number (13731280).

Almost surely, 2^129760407 is an apocalyptic number.

129760407 is a deficient number, since it is larger than the sum of its proper divisors (89940073).

129760407 is an equidigital number, since it uses as much as digits as its factorization.

129760407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686579 (or 686573 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 129760407 is about 11391.2425573332. The cubic root of 129760407 is about 506.2682978297.

The spelling of 129760407 in words is "one hundred twenty-nine million, seven hundred sixty thousand, four hundred seven".