19116631 has 2 divisors, whose sum is σ = 19116632. Its totient is φ = 19116630.

The previous prime is 19116613. The next prime is 19116659. The reversal of 19116631 is 13661191.

Together with previous prime (19116613) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (19116659) can be obtained adding 19116631 to its sum of digits (28).

It is a weak prime.

It is an emirp because it is prime and its reverse (13661191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19116631 - 2⁵ = 19116599 is a prime.

It is a super-2 number, since 2×19116631² = 730891161580322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19116631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19116661) 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 as a sum of consecutive naturals, namely, 9558315 + 9558316.

It is an arithmetic number, because the mean of its divisors is an integer number (9558316).

Almost surely, 2^19116631 is an apocalyptic number.

19116631 is a deficient number, since it is larger than the sum of its proper divisors (1).

19116631 is an equidigital number, since it uses as much as digits as its factorization.

19116631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972, while the sum is 28.

The square root of 19116631 is about 4372.2569686605. The cubic root of 19116631 is about 267.3850485803.

The spelling of 19116631 in words is "nineteen million, one hundred sixteen thousand, six hundred thirty-one".