389748637 has 2 divisors, whose sum is σ = 389748638. Its totient is φ = 389748636.

The previous prime is 389748599. The next prime is 389748659. The reversal of 389748637 is 736847983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 356869881 + 32878756 = 18891^2 + 5734^2 .

It is a cyclic number.

It is not a de Polignac number, because 389748637 - 2⁷ = 389748509 is a prime.

It is a super-3 number, since 3×389748637³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389548637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194874318 + 194874319.

It is an arithmetic number, because the mean of its divisors is an integer number (194874319).

Almost surely, 2^389748637 is an apocalyptic number.

It is an amenable number.

389748637 is a deficient number, since it is larger than the sum of its proper divisors (1).

389748637 is an equidigital number, since it uses as much as digits as its factorization.

389748637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6096384, while the sum is 55.

The square root of 389748637 is about 19742.0525022096. The cubic root of 389748637 is about 730.4573583583.

The spelling of 389748637 in words is "three hundred eighty-nine million, seven hundred forty-eight thousand, six hundred thirty-seven".