129817948 has 24 divisors (see below), whose sum is σ = 249867072. Its totient is φ = 58640064.

The previous prime is 129817939. The next prime is 129817969. The reversal of 129817948 is 849718921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24115 + ... + 29002.

It is an arithmetic number, because the mean of its divisors is an integer number (10411128).

Almost surely, 2^129817948 is an apocalyptic number.

It is an amenable number.

129817948 is a deficient number, since it is larger than the sum of its proper divisors (120049124).

129817948 is a wasteful number, since it uses less digits than its factorization.

129817948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53181 (or 53179 counting only the distinct ones).

The product of its digits is 290304, while the sum is 49.

The square root of 129817948 is about 11393.7679456798. The cubic root of 129817948 is about 506.3431200344.

The spelling of 129817948 in words is "one hundred twenty-nine million, eight hundred seventeen thousand, nine hundred forty-eight".