390889379443 has 2 divisors, whose sum is σ = 390889379444. Its totient is φ = 390889379442.

The previous prime is 390889379431. The next prime is 390889379471. The reversal of 390889379443 is 344973988093.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-390889379443 is a prime.

It is a super-2 number, since 2×390889379443² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (390889379743) 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, 195444689721 + 195444689722.

It is an arithmetic number, because the mean of its divisors is an integer number (195444689722).

Almost surely, 2^390889379443 is an apocalyptic number.

390889379443 is a deficient number, since it is larger than the sum of its proper divisors (1).

390889379443 is an equidigital number, since it uses as much as digits as its factorization.

390889379443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141087744, while the sum is 67.

The spelling of 390889379443 in words is "three hundred ninety billion, eight hundred eighty-nine million, three hundred seventy-nine thousand, four hundred forty-three".