389976133 has 8 divisors (see below), whose sum is σ = 399747096. Its totient is φ = 380217600.

The previous prime is 389976101. The next prime is 389976149. The reversal of 389976133 is 331679983.

It can be written as a sum of positive squares in 4 ways, for example, as 66048129 + 323928004 = 8127^2 + 17998^2 .

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

It is not a de Polignac number, because 389976133 - 2⁵ = 389976101 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 (389976163) 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, 119463 + ... + 122683.

It is an arithmetic number, because the mean of its divisors is an integer number (49968387).

Almost surely, 2^389976133 is an apocalyptic number.

It is an amenable number.

389976133 is a deficient number, since it is larger than the sum of its proper divisors (9770963).

389976133 is a wasteful number, since it uses less digits than its factorization.

389976133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6215.

The product of its digits is 734832, while the sum is 49.

The square root of 389976133 is about 19747.8133726243. The cubic root of 389976133 is about 730.5994531938.

The spelling of 389976133 in words is "three hundred eighty-nine million, nine hundred seventy-six thousand, one hundred thirty-three".