16798121 has 4 divisors (see below), whose sum is σ = 17000592. Its totient is φ = 16595652.

The previous prime is 16798097. The next prime is 16798123. The reversal of 16798121 is 12189761.

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 a cyclic number.

It is not a de Polignac number, because 16798121 - 2¹⁰ = 16797097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16798123) 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, 101111 + ... + 101276.

It is an arithmetic number, because the mean of its divisors is an integer number (4250148).

Almost surely, 2^16798121 is an apocalyptic number.

It is an amenable number.

16798121 is a deficient number, since it is larger than the sum of its proper divisors (202471).

16798121 is an equidigital number, since it uses as much as digits as its factorization.

16798121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202470.

The product of its digits is 6048, while the sum is 35.

The square root of 16798121 is about 4098.5510854447. The cubic root of 16798121 is about 256.1062841961.

The spelling of 16798121 in words is "sixteen million, seven hundred ninety-eight thousand, one hundred twenty-one".