129984751 has 16 divisors (see below), whose sum is σ = 143740800. Its totient is φ = 116794368.

The previous prime is 129984731. The next prime is 129984763. The reversal of 129984751 is 157489921.

It is a cyclic number.

It is not a de Polignac number, because 129984751 - 2¹³ = 129976559 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 (129984731) 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, 139455 + ... + 140383.

It is an arithmetic number, because the mean of its divisors is an integer number (8983800).

Almost surely, 2^129984751 is an apocalyptic number.

129984751 is a deficient number, since it is larger than the sum of its proper divisors (13756049).

129984751 is a wasteful number, since it uses less digits than its factorization.

129984751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218.

The product of its digits is 181440, while the sum is 46.

The square root of 129984751 is about 11401.0855184934. The cubic root of 129984751 is about 506.5598938692.

The spelling of 129984751 in words is "one hundred twenty-nine million, nine hundred eighty-four thousand, seven hundred fifty-one".