16106993 has 4 divisors (see below), whose sum is σ = 18408000. Its totient is φ = 13805988.

The previous prime is 16106971. The next prime is 16107017. The reversal of 16106993 is 39960161.

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: 39960161 = 149 ⋅268189.

It is not a de Polignac number, because 16106993 - 2⁶ = 16106929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16106963) 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, 1150493 + ... + 1150506.

It is an arithmetic number, because the mean of its divisors is an integer number (4602000).

Almost surely, 2^16106993 is an apocalyptic number.

It is an amenable number.

16106993 is a deficient number, since it is larger than the sum of its proper divisors (2301007).

16106993 is an equidigital number, since it uses as much as digits as its factorization.

16106993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2301006.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 16106993 is about 4013.3518410426. The cubic root of 16106993 is about 252.5446406712.

The spelling of 16106993 in words is "sixteen million, one hundred six thousand, nine hundred ninety-three".