390459469 has 2 divisors, whose sum is σ = 390459470. Its totient is φ = 390459468.

The previous prime is 390459457. The next prime is 390459493. The reversal of 390459469 is 964954093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 290259369 + 100200100 = 17037^2 + 10010^2 .

It is a cyclic number.

It is not a de Polignac number, because 390459469 - 2⁵ = 390459437 is a prime.

It is a super-2 number, since 2×390459469² = 304917193863523922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (390459439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195229734 + 195229735.

It is an arithmetic number, because the mean of its divisors is an integer number (195229735).

Almost surely, 2^390459469 is an apocalyptic number.

It is an amenable number.

390459469 is a deficient number, since it is larger than the sum of its proper divisors (1).

390459469 is an equidigital number, since it uses as much as digits as its factorization.

390459469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1049760, while the sum is 49.

The square root of 390459469 is about 19760.0472924535. The cubic root of 390459469 is about 730.9011633073.

The spelling of 390459469 in words is "three hundred ninety million, four hundred fifty-nine thousand, four hundred sixty-nine".