390618049 has 2 divisors, whose sum is σ = 390618050. Its totient is φ = 390618048.

The previous prime is 390618047. The next prime is 390618071. The reversal of 390618049 is 940816093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 342065025 + 48553024 = 18495^2 + 6968^2 .

It is a cyclic number.

It is not a de Polignac number, because 390618049 - 2¹ = 390618047 is a prime.

Together with 390618047, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (390618043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195309024 + 195309025.

It is an arithmetic number, because the mean of its divisors is an integer number (195309025).

Almost surely, 2^390618049 is an apocalyptic number.

It is an amenable number.

390618049 is a deficient number, since it is larger than the sum of its proper divisors (1).

390618049 is an equidigital number, since it uses as much as digits as its factorization.

390618049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 390618049 is about 19764.0595273340. The cubic root of 390618049 is about 731.0000985601. Note that the first 4 decimals are identical.

The spelling of 390618049 in words is "three hundred ninety million, six hundred eighteen thousand, forty-nine".