16253993 has 4 divisors (see below), whose sum is σ = 18576000. Its totient is φ = 13931988.

The previous prime is 16253983. The next prime is 16254001. The reversal of 16253993 is 39935261.

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.

It is not a de Polignac number, because 16253993 - 2¹² = 16249897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16253903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1160993 + ... + 1161006.

It is an arithmetic number, because the mean of its divisors is an integer number (4644000).

Almost surely, 2^16253993 is an apocalyptic number.

It is an amenable number.

16253993 is a deficient number, since it is larger than the sum of its proper divisors (2322007).

16253993 is an equidigital number, since it uses as much as digits as its factorization.

16253993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2322006.

The product of its digits is 43740, while the sum is 38.

The square root of 16253993 is about 4031.6241144234. The cubic root of 16253993 is about 253.3105956432.

The spelling of 16253993 in words is "sixteen million, two hundred fifty-three thousand, nine hundred ninety-three".