390726841 has 2 divisors, whose sum is σ = 390726842. Its totient is φ = 390726840.

The previous prime is 390726823. The next prime is 390726857. The reversal of 390726841 is 148627093.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 303491241 + 87235600 = 17421^2 + 9340^2 .

It is an emirp because it is prime and its reverse (148627093) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 390726841 - 2¹³ = 390718649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 390726794 and 390726803.

It is not a weakly prime, because it can be changed into another prime (390726881) 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, 195363420 + 195363421.

It is an arithmetic number, because the mean of its divisors is an integer number (195363421).

Almost surely, 2^390726841 is an apocalyptic number.

It is an amenable number.

390726841 is a deficient number, since it is larger than the sum of its proper divisors (1).

390726841 is an equidigital number, since it uses as much as digits as its factorization.

390726841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 390726841 is about 19766.8116043028. The cubic root of 390726841 is about 731.0679564765.

The spelling of 390726841 in words is "three hundred ninety million, seven hundred twenty-six thousand, eight hundred forty-one".