389431901 has 2 divisors, whose sum is σ = 389431902. Its totient is φ = 389431900.

The previous prime is 389431897. The next prime is 389431927. The reversal of 389431901 is 109134983.

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., 273869401 + 115562500 = 16549^2 + 10750^2 .

It is a cyclic number.

It is not a de Polignac number, because 389431901 - 2² = 389431897 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389431501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194715950 + 194715951.

It is an arithmetic number, because the mean of its divisors is an integer number (194715951).

Almost surely, 2^389431901 is an apocalyptic number.

It is an amenable number.

389431901 is a deficient number, since it is larger than the sum of its proper divisors (1).

389431901 is an equidigital number, since it uses as much as digits as its factorization.

389431901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 389431901 is about 19734.0290108229. The cubic root of 389431901 is about 730.2594317789.

The spelling of 389431901 in words is "three hundred eighty-nine million, four hundred thirty-one thousand, nine hundred one".