390254789 has 2 divisors, whose sum is σ = 390254790. Its totient is φ = 390254788.

The previous prime is 390254783. The next prime is 390254797. The reversal of 390254789 is 987452093.

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., 247810564 + 142444225 = 15742^2 + 11935^2 .

It is a cyclic number.

It is not a de Polignac number, because 390254789 - 2⁴ = 390254773 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (390254783) 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, 195127394 + 195127395.

It is an arithmetic number, because the mean of its divisors is an integer number (195127395).

Almost surely, 2^390254789 is an apocalyptic number.

It is an amenable number.

390254789 is a deficient number, since it is larger than the sum of its proper divisors (1).

390254789 is an equidigital number, since it uses as much as digits as its factorization.

390254789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 47.

The square root of 390254789 is about 19754.8674761437. The cubic root of 390254789 is about 730.7734274730.

The spelling of 390254789 in words is "three hundred ninety million, two hundred fifty-four thousand, seven hundred eighty-nine".