390439337 has 2 divisors, whose sum is σ = 390439338. Its totient is φ = 390439336.

The previous prime is 390439307. The next prime is 390439339. The reversal of 390439337 is 733934093.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 379041961 + 11397376 = 19469^2 + 3376^2 .

It is a cyclic number.

It is not a de Polignac number, because 390439337 - 2¹⁶ = 390373801 is a prime.

Together with 390439339, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 390439294 and 390439303.

It is not a weakly prime, because it can be changed into another prime (390439339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195219668 + 195219669.

It is an arithmetic number, because the mean of its divisors is an integer number (195219669).

Almost surely, 2^390439337 is an apocalyptic number.

It is an amenable number.

390439337 is a deficient number, since it is larger than the sum of its proper divisors (1).

390439337 is an equidigital number, since it uses as much as digits as its factorization.

390439337 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 183708, while the sum is 41.

The square root of 390439337 is about 19759.5378741508. The cubic root of 390439337 is about 730.8886013931. Note that the first 3 decimals are identical.

The spelling of 390439337 in words is "three hundred ninety million, four hundred thirty-nine thousand, three hundred thirty-seven".