16840497 has 4 divisors (see below), whose sum is σ = 22454000. Its totient is φ = 11226996.

The previous prime is 16840493. The next prime is 16840507. The reversal of 16840497 is 79404861.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79404861 = 3 ⋅26468287.

It is not a de Polignac number, because 16840497 - 2² = 16840493 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16840493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2806747 + ... + 2806752.

It is an arithmetic number, because the mean of its divisors is an integer number (5613500).

Almost surely, 2^16840497 is an apocalyptic number.

It is an amenable number.

16840497 is a deficient number, since it is larger than the sum of its proper divisors (5613503).

16840497 is an equidigital number, since it uses as much as digits as its factorization.

16840497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5613502.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 16840497 is about 4103.7174610346. The cubic root of 16840497 is about 256.3214599830.

The spelling of 16840497 in words is "sixteen million, eight hundred forty thousand, four hundred ninety-seven".