875921491 has 2 divisors, whose sum is σ = 875921492. Its totient is φ = 875921490.

The previous prime is 875921483. The next prime is 875921551. The reversal of 875921491 is 194129578.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 875921491 - 2³ = 875921483 is a prime.

It is not a weakly prime, because it can be changed into another prime (875921471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 437960745 + 437960746.

It is an arithmetic number, because the mean of its divisors is an integer number (437960746).

Almost surely, 2^875921491 is an apocalyptic number.

875921491 is a deficient number, since it is larger than the sum of its proper divisors (1).

875921491 is an equidigital number, since it uses as much as digits as its factorization.

875921491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 46.

The square root of 875921491 is about 29595.9708575340. The cubic root of 875921491 is about 956.8012352772.

The spelling of 875921491 in words is "eight hundred seventy-five million, nine hundred twenty-one thousand, four hundred ninety-one".