389149693 has 2 divisors, whose sum is σ = 389149694. Its totient is φ = 389149692.

The previous prime is 389149687. The next prime is 389149711. The reversal of 389149693 is 396941983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 388011204 + 1138489 = 19698^2 + 1067^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389149693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 389149693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389149493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194574846 + 194574847.

It is an arithmetic number, because the mean of its divisors is an integer number (194574847).

Almost surely, 2^389149693 is an apocalyptic number.

It is an amenable number.

389149693 is a deficient number, since it is larger than the sum of its proper divisors (1).

389149693 is an equidigital number, since it uses as much as digits as its factorization.

389149693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1259712, while the sum is 52.

The square root of 389149693 is about 19726.8774264961. The cubic root of 389149693 is about 730.0829911276.

The spelling of 389149693 in words is "three hundred eighty-nine million, one hundred forty-nine thousand, six hundred ninety-three".