874421491 has 2 divisors, whose sum is σ = 874421492. Its totient is φ = 874421490.

The previous prime is 874421461. The next prime is 874421551. The reversal of 874421491 is 194124478.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 874421491 - 2⁹ = 874420979 is a prime.

It is a super-2 number, since 2×874421491² = 1529225887845326162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (874421461) 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 as a sum of consecutive naturals, namely, 437210745 + 437210746.

It is an arithmetic number, because the mean of its divisors is an integer number (437210746).

Almost surely, 2^874421491 is an apocalyptic number.

874421491 is a deficient number, since it is larger than the sum of its proper divisors (1).

874421491 is an equidigital number, since it uses as much as digits as its factorization.

874421491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 40.

The square root of 874421491 is about 29570.6187118227. The cubic root of 874421491 is about 956.2547548370.

The spelling of 874421491 in words is "eight hundred seventy-four million, four hundred twenty-one thousand, four hundred ninety-one".