389940461 has 2 divisors, whose sum is σ = 389940462. Its totient is φ = 389940460.

The previous prime is 389940457. The next prime is 389940479. The reversal of 389940461 is 164049983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 372258436 + 17682025 = 19294^2 + 4205^2 .

It is a cyclic number.

It is not a de Polignac number, because 389940461 - 2² = 389940457 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389940431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194970230 + 194970231.

It is an arithmetic number, because the mean of its divisors is an integer number (194970231).

Almost surely, 2^389940461 is an apocalyptic number.

It is an amenable number.

389940461 is a deficient number, since it is larger than the sum of its proper divisors (1).

389940461 is an equidigital number, since it uses as much as digits as its factorization.

389940461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 389940461 is about 19746.9101633648. The cubic root of 389940461 is about 730.5771759857.

It can be divided in two parts, 38 and 9940461, that added together give a palindrome (9940499).

The spelling of 389940461 in words is "three hundred eighty-nine million, nine hundred forty thousand, four hundred sixty-one".