390746417 has 2 divisors, whose sum is σ = 390746418. Its totient is φ = 390746416.

The previous prime is 390746399. The next prime is 390746453. The reversal of 390746417 is 714647093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 267780496 + 122965921 = 16364^2 + 11089^2 .

It is a cyclic number.

It is not a de Polignac number, because 390746417 - 2²⁴ = 373969201 is a prime.

It is not a weakly prime, because it can be changed into another prime (390746017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195373208 + 195373209.

It is an arithmetic number, because the mean of its divisors is an integer number (195373209).

Almost surely, 2^390746417 is an apocalyptic number.

It is an amenable number.

390746417 is a deficient number, since it is larger than the sum of its proper divisors (1).

390746417 is an equidigital number, since it uses as much as digits as its factorization.

390746417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 390746417 is about 19767.3067715357. The cubic root of 390746417 is about 731.0801654725.

The spelling of 390746417 in words is "three hundred ninety million, seven hundred forty-six thousand, four hundred seventeen".