16696391 has 2 divisors, whose sum is σ = 16696392. Its totient is φ = 16696390.

The previous prime is 16696369. The next prime is 16696409. The reversal of 16696391 is 19369661.

It is a strong prime.

It is an emirp because it is prime and its reverse (19369661) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16696391 is a prime.

It is a super-3 number, since 3×16696391³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16696331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8348195 + 8348196.

It is an arithmetic number, because the mean of its divisors is an integer number (8348196).

Almost surely, 2^16696391 is an apocalyptic number.

16696391 is a deficient number, since it is larger than the sum of its proper divisors (1).

16696391 is an equidigital number, since it uses as much as digits as its factorization.

16696391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52488, while the sum is 41.

The square root of 16696391 is about 4086.1217554057. The cubic root of 16696391 is about 255.5882408590.

The spelling of 16696391 in words is "sixteen million, six hundred ninety-six thousand, three hundred ninety-one".