389892991 has 2 divisors, whose sum is σ = 389892992. Its totient is φ = 389892990.

The previous prime is 389892959. The next prime is 389893019. The reversal of 389892991 is 199298983.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 389892991 - 2⁵ = 389892959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389892931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194946495 + 194946496.

It is an arithmetic number, because the mean of its divisors is an integer number (194946496).

Almost surely, 2^389892991 is an apocalyptic number.

389892991 is a deficient number, since it is larger than the sum of its proper divisors (1).

389892991 is an equidigital number, since it uses as much as digits as its factorization.

389892991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2519424, while the sum is 58.

The square root of 389892991 is about 19745.7081665865. The cubic root of 389892991 is about 730.5475288050.

The spelling of 389892991 in words is "three hundred eighty-nine million, eight hundred ninety-two thousand, nine hundred ninety-one".