389253581 has 2 divisors, whose sum is σ = 389253582. Its totient is φ = 389253580.

The previous prime is 389253569. The next prime is 389253611. The reversal of 389253581 is 185352983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 359102500 + 30151081 = 18950^2 + 5491^2 .

It is a cyclic number.

It is not a de Polignac number, because 389253581 - 2²⁶ = 322144717 is a prime.

It is a super-2 number, since 2×389253581² = 303036700642647122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389253511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194626790 + 194626791.

It is an arithmetic number, because the mean of its divisors is an integer number (194626791).

Almost surely, 2^389253581 is an apocalyptic number.

It is an amenable number.

389253581 is a deficient number, since it is larger than the sum of its proper divisors (1).

389253581 is an equidigital number, since it uses as much as digits as its factorization.

389253581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 259200, while the sum is 44.

The square root of 389253581 is about 19729.5104095363. The cubic root of 389253581 is about 730.1479533729.

The spelling of 389253581 in words is "three hundred eighty-nine million, two hundred fifty-three thousand, five hundred eighty-one".