16709998 has 4 divisors (see below), whose sum is σ = 25065000. Its totient is φ = 8354998.

The previous prime is 16709993. The next prime is 16710019. The reversal of 16709998 is 89990761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89990761 = 7 ⋅12855823.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16709993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4177498 + ... + 4177501.

It is an arithmetic number, because the mean of its divisors is an integer number (6266250).

Almost surely, 2^16709998 is an apocalyptic number.

16709998 is a deficient number, since it is larger than the sum of its proper divisors (8355002).

16709998 is an equidigital number, since it uses as much as digits as its factorization.

16709998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8355001.

The product of its (nonzero) digits is 244944, while the sum is 49.

The square root of 16709998 is about 4087.7864425628. The cubic root of 16709998 is about 255.6576539607.

The spelling of 16709998 in words is "sixteen million, seven hundred nine thousand, nine hundred ninety-eight".