129102983 has 4 divisors (see below), whose sum is σ = 133554840. Its totient is φ = 124651128.

The previous prime is 129102959. The next prime is 129102991. The reversal of 129102983 is 389201921.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129102983 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 (129102923) 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, 2225885 + ... + 2225942.

It is an arithmetic number, because the mean of its divisors is an integer number (33388710).

Almost surely, 2^129102983 is an apocalyptic number.

129102983 is a deficient number, since it is larger than the sum of its proper divisors (4451857).

129102983 is an equidigital number, since it uses as much as digits as its factorization.

129102983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4451856.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 129102983 is about 11362.3493609376. The cubic root of 129102983 is about 505.4118562851.

The spelling of 129102983 in words is "one hundred twenty-nine million, one hundred two thousand, nine hundred eighty-three".