16391741 has 2 divisors, whose sum is σ = 16391742. Its totient is φ = 16391740.

The previous prime is 16391707. The next prime is 16391743. The reversal of 16391741 is 14719361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13764100 + 2627641 = 3710^2 + 1621^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16391741 is a prime.

It is a super-2 number, since 2×16391741² = 537378346022162, which contains 22 as substring.

Together with 16391743, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 16391698 and 16391707.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16391743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8195870 + 8195871.

It is an arithmetic number, because the mean of its divisors is an integer number (8195871).

Almost surely, 2^16391741 is an apocalyptic number.

It is an amenable number.

16391741 is a deficient number, since it is larger than the sum of its proper divisors (1).

16391741 is an equidigital number, since it uses as much as digits as its factorization.

16391741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 32.

The square root of 16391741 is about 4048.6715105081. The cubic root of 16391741 is about 254.0241622498.

The spelling of 16391741 in words is "sixteen million, three hundred ninety-one thousand, seven hundred forty-one".