389008457 has 2 divisors, whose sum is σ = 389008458. Its totient is φ = 389008456.

The previous prime is 389008447. The next prime is 389008481. The reversal of 389008457 is 754800983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 283720336 + 105288121 = 16844^2 + 10261^2 .

It is a cyclic number.

It is not a de Polignac number, because 389008457 - 2⁸ = 389008201 is a prime.

It is not a weakly prime, because it can be changed into another prime (389008427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194504228 + 194504229.

It is an arithmetic number, because the mean of its divisors is an integer number (194504229).

Almost surely, 2^389008457 is an apocalyptic number.

It is an amenable number.

389008457 is a deficient number, since it is larger than the sum of its proper divisors (1).

389008457 is an equidigital number, since it uses as much as digits as its factorization.

389008457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 389008457 is about 19723.2973156113. The cubic root of 389008457 is about 729.9946562441.

The spelling of 389008457 in words is "three hundred eighty-nine million, eight thousand, four hundred fifty-seven".