16690031 has 2 divisors, whose sum is σ = 16690032. Its totient is φ = 16690030.

The previous prime is 16690001. The next prime is 16690033. The reversal of 16690031 is 13009661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16690031 - 2¹⁴ = 16673647 is a prime.

It is a super-2 number, since 2×16690031² = 557114269561922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 16690033, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16690033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8345015 + 8345016.

It is an arithmetic number, because the mean of its divisors is an integer number (8345016).

Almost surely, 2^16690031 is an apocalyptic number.

16690031 is a deficient number, since it is larger than the sum of its proper divisors (1).

16690031 is an equidigital number, since it uses as much as digits as its factorization.

16690031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 16690031 is about 4085.3434372155. The cubic root of 16690031 is about 255.5557837917. Note that the first 3 decimals are identical.

Adding to 16690031 its reverse (13009661), we get a palindrome (29699692).

The spelling of 16690031 in words is "sixteen million, six hundred ninety thousand, thirty-one".