16823725 has 6 divisors (see below), whose sum is σ = 20861450. Its totient is φ = 13458960.

The previous prime is 16823713. The next prime is 16823743. The reversal of 16823725 is 52732861.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2368521 + 14455204 = 1539^2 + 3802^2 .

It is not a de Polignac number, because 16823725 - 2¹¹ = 16821677 is a prime.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 336450 + ... + 336499.

Almost surely, 2^16823725 is an apocalyptic number.

It is an amenable number.

16823725 is a deficient number, since it is larger than the sum of its proper divisors (4037725).

16823725 is an equidigital number, since it uses as much as digits as its factorization.

16823725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672959 (or 672954 counting only the distinct ones).

The product of its digits is 20160, while the sum is 34.

The square root of 16823725 is about 4101.6734389759. The cubic root of 16823725 is about 256.2363387522.

The spelling of 16823725 in words is "sixteen million, eight hundred twenty-three thousand, seven hundred twenty-five".