875056989421 has 2 divisors, whose sum is σ = 875056989422. Its totient is φ = 875056989420.

The previous prime is 875056989413. The next prime is 875056989461. The reversal of 875056989421 is 124989650578.

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., 765852516900 + 109204472521 = 875130^2 + 330461^2 .

It is a cyclic number.

It is not a de Polignac number, because 875056989421 - 2³ = 875056989413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (875056989461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 437528494710 + 437528494711.

It is an arithmetic number, because the mean of its divisors is an integer number (437528494711).

Almost surely, 2^875056989421 is an apocalyptic number.

It is an amenable number.

875056989421 is a deficient number, since it is larger than the sum of its proper divisors (1).

875056989421 is an equidigital number, since it uses as much as digits as its factorization.

875056989421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43545600, while the sum is 64.

The spelling of 875056989421 in words is "eight hundred seventy-five billion, fifty-six million, nine hundred eighty-nine thousand, four hundred twenty-one".