16840413 has 8 divisors (see below), whose sum is σ = 24948800. Its totient is φ = 11226924.

The previous prime is 16840399. The next prime is 16840433. The reversal of 16840413 is 31404861.

It is not a de Polignac number, because 16840413 - 2⁶ = 16840349 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 623719 = 16840413 / (1 + 6 + 8 + 4 + 0 + 4 + 1 + 3).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16840433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 311833 + ... + 311886.

It is an arithmetic number, because the mean of its divisors is an integer number (3118600).

Almost surely, 2^16840413 is an apocalyptic number.

It is an amenable number.

16840413 is a deficient number, since it is larger than the sum of its proper divisors (8108387).

16840413 is an equidigital number, since it uses as much as digits as its factorization.

16840413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623728 (or 623722 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 16840413 is about 4103.7072263991. The cubic root of 16840413 is about 256.3210338071.

The spelling of 16840413 in words is "sixteen million, eight hundred forty thousand, four hundred thirteen".