16391941 has 2 divisors, whose sum is σ = 16391942. Its totient is φ = 16391940.

The previous prime is 16391929. The next prime is 16391971. The reversal of 16391941 is 14919361.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14791716 + 1600225 = 3846^2 + 1265^2 .

It is an emirp because it is prime and its reverse (14919361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16391941 - 2⁵ = 16391909 is a prime.

It is a super-3 number, since 3×16391941³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16391897 and 16391906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16391971) 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, 8195970 + 8195971.

It is an arithmetic number, because the mean of its divisors is an integer number (8195971).

Almost surely, 2^16391941 is an apocalyptic number.

It is an amenable number.

16391941 is a deficient number, since it is larger than the sum of its proper divisors (1).

16391941 is an equidigital number, since it uses as much as digits as its factorization.

16391941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 34.

The square root of 16391941 is about 4048.6962098928. The cubic root of 16391941 is about 254.0251953844.

The spelling of 16391941 in words is "sixteen million, three hundred ninety-one thousand, nine hundred forty-one".