390394369 has 2 divisors, whose sum is σ = 390394370. Its totient is φ = 390394368.

The previous prime is 390394357. The next prime is 390394399. The reversal of 390394369 is 963493093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 239104369 + 151290000 = 15463^2 + 12300^2 .

It is an emirp because it is prime and its reverse (963493093) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 390394369 - 2⁵ = 390394337 is a prime.

It is a super-2 number, since 2×390394369² = 304815526693816322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (390394399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195197184 + 195197185.

It is an arithmetic number, because the mean of its divisors is an integer number (195197185).

Almost surely, 2^390394369 is an apocalyptic number.

It is an amenable number.

390394369 is a deficient number, since it is larger than the sum of its proper divisors (1).

390394369 is an equidigital number, since it uses as much as digits as its factorization.

390394369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 472392, while the sum is 46.

The square root of 390394369 is about 19758.3999605231. The cubic root of 390394369 is about 730.8605408150.

The spelling of 390394369 in words is "three hundred ninety million, three hundred ninety-four thousand, three hundred sixty-nine".