390884224681 has 2 divisors, whose sum is σ = 390884224682. Its totient is φ = 390884224680.

The previous prime is 390884224673. The next prime is 390884224777. The reversal of 390884224681 is 186422488093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 244811206656 + 146073018025 = 494784^2 + 382195^2 .

It is a cyclic number.

It is not a de Polignac number, because 390884224681 - 2³ = 390884224673 is a prime.

It is a super-2 number, since 2×390884224681² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (390884224631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195442112340 + 195442112341.

It is an arithmetic number, because the mean of its divisors is an integer number (195442112341).

Almost surely, 2^390884224681 is an apocalyptic number.

It is an amenable number.

390884224681 is a deficient number, since it is larger than the sum of its proper divisors (1).

390884224681 is an equidigital number, since it uses as much as digits as its factorization.

390884224681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5308416, while the sum is 55.

The spelling of 390884224681 in words is "three hundred ninety billion, eight hundred eighty-four million, two hundred twenty-four thousand, six hundred eighty-one".