16999961 has 8 divisors (see below), whose sum is σ = 18582048. Its totient is φ = 15424000.

The previous prime is 16999903. The next prime is 16999963.

16999961 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16999961 - 2⁶ = 16999897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16999963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5846 + ... + 8256.

It is an arithmetic number, because the mean of its divisors is an integer number (2322756).

Almost surely, 2^16999961 is an apocalyptic number.

16999961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16999961 is a deficient number, since it is larger than the sum of its proper divisors (1582087).

16999961 is a wasteful number, since it uses less digits than its factorization.

16999961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3063.

The product of its digits is 236196, while the sum is 50.

The square root of 16999961 is about 4123.1008961703. The cubic root of 16999961 is about 257.1279624383.

The spelling of 16999961 in words is "sixteen million, nine hundred ninety-nine thousand, nine hundred sixty-one".