129770776 has 16 divisors (see below), whose sum is σ = 243494640. Its totient is φ = 64838880.

The previous prime is 129770717. The next prime is 129770801. The reversal of 129770776 is 677077921.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7965 + ... + 17971.

It is an arithmetic number, because the mean of its divisors is an integer number (15218415).

Almost surely, 2^129770776 is an apocalyptic number.

It is an amenable number.

129770776 is a deficient number, since it is larger than the sum of its proper divisors (113723864).

129770776 is a wasteful number, since it uses less digits than its factorization.

129770776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11634 (or 11630 counting only the distinct ones).

The product of its (nonzero) digits is 259308, while the sum is 46.

The square root of 129770776 is about 11391.6976785728. The cubic root of 129770776 is about 506.2817825700.

The spelling of 129770776 in words is "one hundred twenty-nine million, seven hundred seventy thousand, seven hundred seventy-six".