16398841 has 2 divisors, whose sum is σ = 16398842. Its totient is φ = 16398840.

The previous prime is 16398797. The next prime is 16398847. The reversal of 16398841 is 14889361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16168441 + 230400 = 4021^2 + 480^2 .

It is a cyclic number.

It is not a de Polignac number, because 16398841 - 2⁹ = 16398329 is a prime.

It is a super-2 number, since 2×16398841² = 537843972286562, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16398794 and 16398803.

It is not a weakly prime, because it can be changed into another prime (16398847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8199420 + 8199421.

It is an arithmetic number, because the mean of its divisors is an integer number (8199421).

Almost surely, 2^16398841 is an apocalyptic number.

It is an amenable number.

16398841 is a deficient number, since it is larger than the sum of its proper divisors (1).

16398841 is an equidigital number, since it uses as much as digits as its factorization.

16398841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 40.

The square root of 16398841 is about 4049.5482464097. The cubic root of 16398841 is about 254.0608333842.

The spelling of 16398841 in words is "sixteen million, three hundred ninety-eight thousand, eight hundred forty-one".