129726965 has 8 divisors (see below), whose sum is σ = 163865760. Its totient is φ = 98319312.

The previous prime is 129726953. The next prime is 129726967. The reversal of 129726965 is 569627921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129726965 - 2⁶ = 129726901 is a prime.

It is a super-2 number, since 2×129726965² = 33658170896222450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129726967) 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, 682679 + ... + 682868.

It is an arithmetic number, because the mean of its divisors is an integer number (20483220).

Almost surely, 2^129726965 is an apocalyptic number.

It is an amenable number.

129726965 is a deficient number, since it is larger than the sum of its proper divisors (34138795).

129726965 is a wasteful number, since it uses less digits than its factorization.

129726965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365571.

The product of its digits is 408240, while the sum is 47.

The square root of 129726965 is about 11389.7745807369. The cubic root of 129726965 is about 506.2248020787.

The spelling of 129726965 in words is "one hundred twenty-nine million, seven hundred twenty-six thousand, nine hundred sixty-five".