16168997 has 8 divisors (see below), whose sum is σ = 17461080. Its totient is φ = 14883840.

The previous prime is 16168991. The next prime is 16169017. The reversal of 16168997 is 79986161.

It can be written as a sum of positive squares in 4 ways, for example, as 7695076 + 8473921 = 2774^2 + 2911^2 .

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 16168997 - 2¹⁸ = 15906853 is a prime.

It is a super-2 number, since 2×16168997² = 522872927972018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16168991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3797 + ... + 6837.

It is an arithmetic number, because the mean of its divisors is an integer number (2182635).

Almost surely, 2^16168997 is an apocalyptic number.

It is an amenable number.

16168997 is a deficient number, since it is larger than the sum of its proper divisors (1292083).

16168997 is a wasteful number, since it uses less digits than its factorization.

16168997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3463.

The product of its digits is 163296, while the sum is 47.

The square root of 16168997 is about 4021.0691364362. The cubic root of 16168997 is about 252.8682832840.

The spelling of 16168997 in words is "sixteen million, one hundred sixty-eight thousand, nine hundred ninety-seven".