390579481 has 2 divisors, whose sum is σ = 390579482. Its totient is φ = 390579480.

The previous prime is 390579479. The next prime is 390579487. The reversal of 390579481 is 184975093.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 260984025 + 129595456 = 16155^2 + 11384^2 .

It is a cyclic number.

It is not a de Polignac number, because 390579481 - 2¹ = 390579479 is a prime.

It is a super-2 number, since 2×390579481² = 305104661956458722, which contains 22 as substring.

Together with 390579479, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (390579487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195289740 + 195289741.

It is an arithmetic number, because the mean of its divisors is an integer number (195289741).

Almost surely, 2^390579481 is an apocalyptic number.

It is an amenable number.

390579481 is a deficient number, since it is larger than the sum of its proper divisors (1).

390579481 is an equidigital number, since it uses as much as digits as its factorization.

390579481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 390579481 is about 19763.0837927688. The cubic root of 390579481 is about 730.9760391327.

The spelling of 390579481 in words is "three hundred ninety million, five hundred seventy-nine thousand, four hundred eighty-one".