16436491 has 2 divisors, whose sum is σ = 16436492. Its totient is φ = 16436490.

The previous prime is 16436471. The next prime is 16436509. The reversal of 16436491 is 19463461.

It is a strong prime.

It is an emirp because it is prime and its reverse (19463461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16436491 - 2¹⁹ = 15912203 is a prime.

It is not a weakly prime, because it can be changed into another prime (16436401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8218245 + 8218246.

It is an arithmetic number, because the mean of its divisors is an integer number (8218246).

Almost surely, 2^16436491 is an apocalyptic number.

16436491 is a deficient number, since it is larger than the sum of its proper divisors (1).

16436491 is an equidigital number, since it uses as much as digits as its factorization.

16436491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 34.

The square root of 16436491 is about 4054.1942479363. The cubic root of 16436491 is about 254.2551170193.

The spelling of 16436491 in words is "sixteen million, four hundred thirty-six thousand, four hundred ninety-one".