390679234489 has 4 divisors (see below), whose sum is σ = 404150932260. Its totient is φ = 377207536720.

The previous prime is 390679234423. The next prime is 390679234513. The reversal of 390679234489 is 984432976093.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 275065634089 + 115613600400 = 524467^2 + 340020^2 .

It is a cyclic number.

It is not a de Polignac number, because 390679234489 - 2²¹ = 390677137337 is a prime.

It is a super-2 number, since 2×390679234489² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 390679234489.

It is not an unprimeable number, because it can be changed into a prime (390679234409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6735848842 + ... + 6735848899.

It is an arithmetic number, because the mean of its divisors is an integer number (101037733065).

Almost surely, 2^390679234489 is an apocalyptic number.

It is an amenable number.

390679234489 is a deficient number, since it is larger than the sum of its proper divisors (13471697771).

390679234489 is a wasteful number, since it uses less digits than its factorization.

390679234489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13471697770.

The product of its (nonzero) digits is 70543872, while the sum is 64.

The spelling of 390679234489 in words is "three hundred ninety billion, six hundred seventy-nine million, two hundred thirty-four thousand, four hundred eighty-nine".