390908039 has 2 divisors, whose sum is σ = 390908040. Its totient is φ = 390908038.

The previous prime is 390908009. The next prime is 390908041. The reversal of 390908039 is 930809093.

It is a strong prime.

It is an emirp because it is prime and its reverse (930809093) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 390908039 - 2¹² = 390903943 is a prime.

Together with 390908041, 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 = 390907987 and 390908005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (390908009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195454019 + 195454020.

It is an arithmetic number, because the mean of its divisors is an integer number (195454020).

Almost surely, 2^390908039 is an apocalyptic number.

390908039 is a deficient number, since it is larger than the sum of its proper divisors (1).

390908039 is an equidigital number, since it uses as much as digits as its factorization.

390908039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 390908039 is about 19771.3944627080. The cubic root of 390908039 is about 731.1809489526.

The spelling of 390908039 in words is "three hundred ninety million, nine hundred eight thousand, thirty-nine".