16540919 has 2 divisors, whose sum is σ = 16540920. Its totient is φ = 16540918.

The previous prime is 16540913. The next prime is 16540967. The reversal of 16540919 is 91904561.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16540919 is a prime.

It is a super-2 number, since 2×16540919² = 547204002729122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16540913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8270459 + 8270460.

It is an arithmetic number, because the mean of its divisors is an integer number (8270460).

Almost surely, 2^16540919 is an apocalyptic number.

16540919 is a deficient number, since it is larger than the sum of its proper divisors (1).

16540919 is an equidigital number, since it uses as much as digits as its factorization.

16540919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 16540919 is about 4067.0528641757. The cubic root of 16540919 is about 254.7924442045.

The spelling of 16540919 in words is "sixteen million, five hundred forty thousand, nine hundred nineteen".