129773889 has 24 divisors (see below), whose sum is σ = 223546752. Its totient is φ = 70931520.

The previous prime is 129773879. The next prime is 129773953. The reversal of 129773889 is 988377921.

It is not a de Polignac number, because 129773889 - 2⁴ = 129773873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129773849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43332 + ... + 46229.

It is an arithmetic number, because the mean of its divisors is an integer number (9314448).

Almost surely, 2^129773889 is an apocalyptic number.

It is an amenable number.

129773889 is a deficient number, since it is larger than the sum of its proper divisors (93772863).

129773889 is a wasteful number, since it uses less digits than its factorization.

129773889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89597 (or 89594 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 54.

The square root of 129773889 is about 11391.8343123485. The cubic root of 129773889 is about 506.2858308430.

The spelling of 129773889 in words is "one hundred twenty-nine million, seven hundred seventy-three thousand, eight hundred eighty-nine".