129698668 has 24 divisors (see below), whose sum is σ = 255596544. Its totient is φ = 57051600.

The previous prime is 129698663. The next prime is 129698671. The reversal of 129698668 is 866896921.

It is not an unprimeable number, because it can be changed into a prime (129698663) 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, 46180 + ... + 48907.

It is an arithmetic number, because the mean of its divisors is an integer number (10649856).

Almost surely, 2^129698668 is an apocalyptic number.

It is an amenable number.

129698668 is a deficient number, since it is larger than the sum of its proper divisors (125897876).

129698668 is a wasteful number, since it uses less digits than its factorization.

129698668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95133 (or 95131 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 55.

The square root of 129698668 is about 11388.5323022767. The cubic root of 129698668 is about 506.1879922427.

The spelling of 129698668 in words is "one hundred twenty-nine million, six hundred ninety-eight thousand, six hundred sixty-eight".