16993706 has 4 divisors (see below), whose sum is σ = 25490562. Its totient is φ = 8496852.

The previous prime is 16993703. The next prime is 16993741. The reversal of 16993706 is 60739961.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60739961 = 53 ⋅1146037.

It can be written as a sum of positive squares in only one way, i.e., 11662225 + 5331481 = 3415^2 + 2309^2 .

It is a super-2 number, since 2×16993706² = 577572087228872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16993703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4248425 + ... + 4248428.

Almost surely, 2^16993706 is an apocalyptic number.

16993706 is a deficient number, since it is larger than the sum of its proper divisors (8496856).

16993706 is an equidigital number, since it uses as much as digits as its factorization.

16993706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8496855.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 16993706 is about 4122.3422953462. The cubic root of 16993706 is about 257.0964225090.

The spelling of 16993706 in words is "sixteen million, nine hundred ninety-three thousand, seven hundred six".