16999942 has 4 divisors (see below), whose sum is σ = 25499916. Its totient is φ = 8499970.

The previous prime is 16999903. The next prime is 16999963. The reversal of 16999942 is 24999961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24999961 = 7 ⋅3571423.

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 an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4249984 + ... + 4249987.

It is an arithmetic number, because the mean of its divisors is an integer number (6374979).

Almost surely, 2^16999942 is an apocalyptic number.

16999942 is a deficient number, since it is larger than the sum of its proper divisors (8499974).

16999942 is an equidigital number, since it uses as much as digits as its factorization.

16999942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8499973.

The product of its digits is 314928, while the sum is 49.

The square root of 16999942 is about 4123.0985920785. The cubic root of 16999942 is about 257.1278666452.

The spelling of 16999942 in words is "sixteen million, nine hundred ninety-nine thousand, nine hundred forty-two".