129486983 has 4 divisors (see below), whose sum is σ = 129573528. Its totient is φ = 129400440.

The previous prime is 129486971. The next prime is 129486991. The reversal of 129486983 is 389684921.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 129486983 - 2⁴ = 129486967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129486913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40988 + ... + 44033.

It is an arithmetic number, because the mean of its divisors is an integer number (32393382).

Almost surely, 2^129486983 is an apocalyptic number.

129486983 is a deficient number, since it is larger than the sum of its proper divisors (86545).

129486983 is an equidigital number, since it uses as much as digits as its factorization.

129486983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86544.

The product of its digits is 746496, while the sum is 50.

The square root of 129486983 is about 11379.2347282232. The cubic root of 129486983 is about 505.9124541943.

The spelling of 129486983 in words is "one hundred twenty-nine million, four hundred eighty-six thousand, nine hundred eighty-three".