389291953 has 4 divisors (see below), whose sum is σ = 390447460. Its totient is φ = 388136448.

The previous prime is 389291941. The next prime is 389291977. The reversal of 389291953 is 359192983.

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

It can be written as a sum of positive squares in 2 ways, for example, as 110502144 + 278789809 = 10512^2 + 16697^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389291953 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 389291897 and 389291906.

It is not an unprimeable number, because it can be changed into a prime (389291933) 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, 577248 + ... + 577921.

It is an arithmetic number, because the mean of its divisors is an integer number (97611865).

Almost surely, 2^389291953 is an apocalyptic number.

It is an amenable number.

389291953 is a deficient number, since it is larger than the sum of its proper divisors (1155507).

389291953 is a wasteful number, since it uses less digits than its factorization.

389291953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155506.

The product of its digits is 524880, while the sum is 49.

The square root of 389291953 is about 19730.4828374776. The cubic root of 389291953 is about 730.1719448599.

The spelling of 389291953 in words is "three hundred eighty-nine million, two hundred ninety-one thousand, nine hundred fifty-three".