129475983 has 32 divisors (see below), whose sum is σ = 216832000. Its totient is φ = 68287968.

The previous prime is 129475921. The next prime is 129476069. The reversal of 129475983 is 389574921.

It is not a de Polignac number, because 129475983 - 2⁶ = 129475919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129475483) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8538 + ... + 18216.

It is an arithmetic number, because the mean of its divisors is an integer number (6776000).

Almost surely, 2^129475983 is an apocalyptic number.

129475983 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

129475983 is a deficient number, since it is larger than the sum of its proper divisors (87356017).

129475983 is an equidigital number, since it uses as much as digits as its factorization.

129475983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9716 (or 9702 counting only the distinct ones).

The product of its digits is 544320, while the sum is 48.

The square root of 129475983 is about 11378.7513814126. The cubic root of 129475983 is about 505.8981279291.

It can be divided in two parts, 1294 and 75983, that added together give a palindrome (77277).

The spelling of 129475983 in words is "one hundred twenty-nine million, four hundred seventy-five thousand, nine hundred eighty-three".