389158669 has 2 divisors, whose sum is σ = 389158670. Its totient is φ = 389158668.

The previous prime is 389158663. The next prime is 389158691. The reversal of 389158669 is 966851983.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 261242569 + 127916100 = 16163^2 + 11310^2 .

It is an emirp because it is prime and its reverse (966851983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 389158669 - 2⁷ = 389158541 is a prime.

It is a super-2 number, since 2×389158669² = 302888939315703122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389158663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194579334 + 194579335.

It is an arithmetic number, because the mean of its divisors is an integer number (194579335).

Almost surely, 2^389158669 is an apocalyptic number.

It is an amenable number.

389158669 is a deficient number, since it is larger than the sum of its proper divisors (1).

389158669 is an equidigital number, since it uses as much as digits as its factorization.

389158669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2799360, while the sum is 55.

The square root of 389158669 is about 19727.1049320472. The cubic root of 389158669 is about 730.0886043699.

The spelling of 389158669 in words is "three hundred eighty-nine million, one hundred fifty-eight thousand, six hundred sixty-nine".