390791 has 2 divisors, whose sum is σ = 390792. Its totient is φ = 390790.

The previous prime is 390781. The next prime is 390809. The reversal of 390791 is 197093.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 390791 - 2⁶ = 390727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (390721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195395 + 195396.

It is an arithmetic number, because the mean of its divisors is an integer number (195396).

2³⁹⁰⁷⁹¹ is an apocalyptic number.

390791 is a deficient number, since it is larger than the sum of its proper divisors (1).

390791 is an equidigital number, since it uses as much as digits as its factorization.

390791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1701, while the sum is 29.

The square root of 390791 is about 625.1327858943. The cubic root of 390791 is about 73.1107969103.

The spelling of 390791 in words is "three hundred ninety thousand, seven hundred ninety-one".