129975890 has 32 divisors (see below), whose sum is σ = 257774400. Its totient is φ = 46792000.

The previous prime is 129975889. The next prime is 129975929. The reversal of 129975890 is 98579921.

It is a happy number.

It is a super-3 number, since 3×129975890³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5261 + ... + 16959.

It is an arithmetic number, because the mean of its divisors is an integer number (8055450).

Almost surely, 2^129975890 is an apocalyptic number.

129975890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129975890 is a deficient number, since it is larger than the sum of its proper divisors (127798510).

129975890 is a wasteful number, since it uses less digits than its factorization.

129975890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11818.

The product of its (nonzero) digits is 408240, while the sum is 50.

The square root of 129975890 is about 11400.6969085227. The cubic root of 129975890 is about 506.5483829569.

The spelling of 129975890 in words is "one hundred twenty-nine million, nine hundred seventy-five thousand, eight hundred ninety".