16693231 has 2 divisors, whose sum is σ = 16693232. Its totient is φ = 16693230.

The previous prime is 16693223. The next prime is 16693249. The reversal of 16693231 is 13239661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16693231 - 2³ = 16693223 is a prime.

It is a super-2 number, since 2×16693231² = 557327922438722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16693193 and 16693202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16693631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8346615 + 8346616.

It is an arithmetic number, because the mean of its divisors is an integer number (8346616).

Almost surely, 2^16693231 is an apocalyptic number.

16693231 is a deficient number, since it is larger than the sum of its proper divisors (1).

16693231 is an equidigital number, since it uses as much as digits as its factorization.

16693231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 31.

The square root of 16693231 is about 4085.7350623847. The cubic root of 16693231 is about 255.5721154220.

It can be divided in two parts, 1669 and 3231, that added together give a square (4900 = 70²).

The spelling of 16693231 in words is "sixteen million, six hundred ninety-three thousand, two hundred thirty-one".