16651093 has 4 divisors (see below), whose sum is σ = 16696108. Its totient is φ = 16606080.

The previous prime is 16651091. The next prime is 16651111. The reversal of 16651093 is 39015661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39015661 = 61 ⋅639601.

It can be written as a sum of positive squares in 2 ways, for example, as 10804369 + 5846724 = 3287^2 + 2418^2 .

It is a cyclic number.

It is not a de Polignac number, because 16651093 - 2¹ = 16651091 is a prime.

It is a deceptive number, since it divides R_16651092.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16651091) 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, 21948 + ... + 22693.

It is an arithmetic number, because the mean of its divisors is an integer number (4174027).

Almost surely, 2^16651093 is an apocalyptic number.

It is an amenable number.

16651093 is a deficient number, since it is larger than the sum of its proper divisors (45015).

16651093 is an equidigital number, since it uses as much as digits as its factorization.

16651093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45014.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 16651093 is about 4080.5750820197. The cubic root of 16651093 is about 255.3568910192.

The spelling of 16651093 in words is "sixteen million, six hundred fifty-one thousand, ninety-three".