129917764 has 24 divisors (see below), whose sum is σ = 232394400. Its totient is φ = 63530880.

The previous prime is 129917761. The next prime is 129917779. The reversal of 129917764 is 467719921.

129917764 = T₂₀₆₉ + T₂₀₇₀ + ... + T₂₁₂₇.

It is not an unprimeable number, because it can be changed into a prime (129917761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48492 + ... + 51100.

It is an arithmetic number, because the mean of its divisors is an integer number (9683100).

Almost surely, 2^129917764 is an apocalyptic number.

It is an amenable number.

129917764 is a deficient number, since it is larger than the sum of its proper divisors (102476636).

129917764 is a wasteful number, since it uses less digits than its factorization.

129917764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2883 (or 2881 counting only the distinct ones).

The product of its digits is 190512, while the sum is 46.

The square root of 129917764 is about 11398.1473933267. The cubic root of 129917764 is about 506.4728612030.

The spelling of 129917764 in words is "one hundred twenty-nine million, nine hundred seventeen thousand, seven hundred sixty-four".