390341789 has 2 divisors, whose sum is σ = 390341790. Its totient is φ = 390341788.

The previous prime is 390341747. The next prime is 390341837. The reversal of 390341789 is 987143093.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 276556900 + 113784889 = 16630^2 + 10667^2 .

It is a cyclic number.

It is not a de Polignac number, because 390341789 - 2¹² = 390337693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (390341729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195170894 + 195170895.

It is an arithmetic number, because the mean of its divisors is an integer number (195170895).

Almost surely, 2^390341789 is an apocalyptic number.

It is an amenable number.

390341789 is a deficient number, since it is larger than the sum of its proper divisors (1).

390341789 is an equidigital number, since it uses as much as digits as its factorization.

390341789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 390341789 is about 19757.0693423898. The cubic root of 390341789 is about 730.8277275236.

The spelling of 390341789 in words is "three hundred ninety million, three hundred forty-one thousand, seven hundred eighty-nine".