390618077 has 2 divisors, whose sum is σ = 390618078. Its totient is φ = 390618076.

The previous prime is 390618071. The next prime is 390618079. The reversal of 390618077 is 770816093.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 380211001 + 10407076 = 19499^2 + 3226^2 .

It is an emirp because it is prime and its reverse (770816093) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 390618077 - 2⁶ = 390618013 is a prime.

It is a super-3 number, since 3×390618077³ (a number of 27 digits) contains 333 as substring.

Together with 390618079, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (390618071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195309038 + 195309039.

It is an arithmetic number, because the mean of its divisors is an integer number (195309039).

Almost surely, 2^390618077 is an apocalyptic number.

It is an amenable number.

390618077 is a deficient number, since it is larger than the sum of its proper divisors (1).

390618077 is an equidigital number, since it uses as much as digits as its factorization.

390618077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 390618077 is about 19764.0602356904. The cubic root of 390618077 is about 731.0001160264. Note that the first 3 decimals are identical.

The spelling of 390618077 in words is "three hundred ninety million, six hundred eighteen thousand, seventy-seven".