390922841 has 2 divisors, whose sum is σ = 390922842. Its totient is φ = 390922840.

The previous prime is 390922793. The next prime is 390922877. The reversal of 390922841 is 148229093.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 364657216 + 26265625 = 19096^2 + 5125^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-390922841 is a prime.

It is a super-2 number, since 2×390922841² = 305641335231022562, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 390922795 and 390922804.

It is not a weakly prime, because it can be changed into another prime (390928841) 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, 195461420 + 195461421.

It is an arithmetic number, because the mean of its divisors is an integer number (195461421).

Almost surely, 2^390922841 is an apocalyptic number.

It is an amenable number.

390922841 is a deficient number, since it is larger than the sum of its proper divisors (1).

390922841 is an equidigital number, since it uses as much as digits as its factorization.

390922841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 390922841 is about 19771.7687878450. The cubic root of 390922841 is about 731.1901777248.

The spelling of 390922841 in words is "three hundred ninety million, nine hundred twenty-two thousand, eight hundred forty-one".