16945631 has 2 divisors, whose sum is σ = 16945632. Its totient is φ = 16945630.

The previous prime is 16945613. The next prime is 16945639. The reversal of 16945631 is 13654961.

Together with previous prime (16945613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16945631 - 2¹⁰ = 16944607 is a prime.

It is a super-2 number, since 2×16945631² = 574308819976322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 16945591 and 16945600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16945639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8472815 + 8472816.

It is an arithmetic number, because the mean of its divisors is an integer number (8472816).

Almost surely, 2^16945631 is an apocalyptic number.

16945631 is a deficient number, since it is larger than the sum of its proper divisors (1).

16945631 is an equidigital number, since it uses as much as digits as its factorization.

16945631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 35.

The square root of 16945631 is about 4116.5071359102. The cubic root of 16945631 is about 256.8537525814.

It can be divided in two parts, 16945 and 631, that added together give a cube (17576 = 26³).

The spelling of 16945631 in words is "sixteen million, nine hundred forty-five thousand, six hundred thirty-one".