16631941 has 2 divisors, whose sum is σ = 16631942. Its totient is φ = 16631940.

The previous prime is 16631939. The next prime is 16631947. The reversal of 16631941 is 14913661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16402500 + 229441 = 4050^2 + 479^2 .

It is a cyclic number.

It is not a de Polignac number, because 16631941 - 2¹ = 16631939 is a prime.

It is a super-2 number, since 2×16631941² = 553242922854962, which contains 22 as substring.

Together with 16631939, it forms a pair of twin primes.

It is a Chen prime.

It is a nialpdrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16631947) 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, 8315970 + 8315971.

It is an arithmetic number, because the mean of its divisors is an integer number (8315971).

Almost surely, 2^16631941 is an apocalyptic number.

It is an amenable number.

16631941 is a deficient number, since it is larger than the sum of its proper divisors (1).

16631941 is an equidigital number, since it uses as much as digits as its factorization.

16631941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 31.

The square root of 16631941 is about 4078.2276787840. The cubic root of 16631941 is about 255.2589500728.

The spelling of 16631941 in words is "sixteen million, six hundred thirty-one thousand, nine hundred forty-one".