390618013 has 2 divisors, whose sum is σ = 390618014. Its totient is φ = 390618012.

The previous prime is 390617957. The next prime is 390618043. The reversal of 390618013 is 310816093.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 305480484 + 85137529 = 17478^2 + 9227^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-390618013 is a prime.

It is a nialpdrome in base 12.

It is a congruent number.

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, 195309006 + 195309007.

It is an arithmetic number, because the mean of its divisors is an integer number (195309007).

Almost surely, 2^390618013 is an apocalyptic number.

It is an amenable number.

390618013 is a deficient number, since it is larger than the sum of its proper divisors (1).

390618013 is an equidigital number, since it uses as much as digits as its factorization.

390618013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 390618013 is about 19764.0586165899. The cubic root of 390618013 is about 731.0000761034. Note that the first 4 decimals are identical.

It can be divided in two parts, 39061 and 8013, that added together give a palindrome (47074).

The spelling of 390618013 in words is "three hundred ninety million, six hundred eighteen thousand, thirteen".