389129999 has 8 divisors (see below), whose sum is σ = 400658928. Its totient is φ = 377654400.

The previous prime is 389129989. The next prime is 389130023. The reversal of 389129999 is 999921983.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389129999 is a prime.

It is a super-2 number, since 2×389129999² = 302844312243480002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389129929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1724 + ... + 27950.

It is an arithmetic number, because the mean of its divisors is an integer number (50082366).

Almost surely, 2^389129999 is an apocalyptic number.

389129999 is a deficient number, since it is larger than the sum of its proper divisors (11528929).

389129999 is a wasteful number, since it uses less digits than its factorization.

389129999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26665.

The product of its digits is 2834352, while the sum is 59.

The square root of 389129999 is about 19726.3782534960. The cubic root of 389129999 is about 730.0706749613.

The spelling of 389129999 in words is "three hundred eighty-nine million, one hundred twenty-nine thousand, nine hundred ninety-nine".