16422491 has 2 divisors, whose sum is σ = 16422492. Its totient is φ = 16422490.

The previous prime is 16422457. The next prime is 16422503. The reversal of 16422491 is 19422461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16422491 - 2²² = 12228187 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16422401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8211245 + 8211246.

It is an arithmetic number, because the mean of its divisors is an integer number (8211246).

Almost surely, 2^16422491 is an apocalyptic number.

16422491 is a deficient number, since it is larger than the sum of its proper divisors (1).

16422491 is an equidigital number, since it uses as much as digits as its factorization.

16422491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 29.

The square root of 16422491 is about 4052.4672731559. The cubic root of 16422491 is about 254.1829081204.

The spelling of 16422491 in words is "sixteen million, four hundred twenty-two thousand, four hundred ninety-one".