389867431 has 2 divisors, whose sum is σ = 389867432. Its totient is φ = 389867430.

The previous prime is 389867371. The next prime is 389867473. The reversal of 389867431 is 134768983.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389867431 is a prime.

It is a super-2 number, since 2×389867431² = 303993227509079522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389867131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194933715 + 194933716.

It is an arithmetic number, because the mean of its divisors is an integer number (194933716).

Almost surely, 2^389867431 is an apocalyptic number.

389867431 is a deficient number, since it is larger than the sum of its proper divisors (1).

389867431 is an equidigital number, since it uses as much as digits as its factorization.

389867431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 49.

The square root of 389867431 is about 19745.0609267229. The cubic root of 389867431 is about 730.5315644222.

The spelling of 389867431 in words is "three hundred eighty-nine million, eight hundred sixty-seven thousand, four hundred thirty-one".