390909800947 has 4 divisors (see below), whose sum is σ = 396744275656. Its totient is φ = 385075326240.

The previous prime is 390909800933. The next prime is 390909800977. The reversal of 390909800947 is 749008909093.

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

It is a cyclic number.

It is not a de Polignac number, because 390909800947 - 2²³ = 390901412339 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 390909800891 and 390909800900.

It is not an unprimeable number, because it can be changed into a prime (390909800927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2917237254 + ... + 2917237387.

It is an arithmetic number, because the mean of its divisors is an integer number (99186068914).

Almost surely, 2^390909800947 is an apocalyptic number.

390909800947 is a deficient number, since it is larger than the sum of its proper divisors (5834474709).

390909800947 is an equidigital number, since it uses as much as digits as its factorization.

390909800947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5834474708.

The product of its (nonzero) digits is 4408992, while the sum is 58.

The spelling of 390909800947 in words is "three hundred ninety billion, nine hundred nine million, eight hundred thousand, nine hundred forty-seven".