16540613 has 2 divisors, whose sum is σ = 16540614. Its totient is φ = 16540612.

The previous prime is 16540603. The next prime is 16540619. The reversal of 16540613 is 31604561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8514724 + 8025889 = 2918^2 + 2833^2 .

It is an emirp because it is prime and its reverse (31604561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16540613 - 2⁴ = 16540597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16540619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8270306 + 8270307.

It is an arithmetic number, because the mean of its divisors is an integer number (8270307).

Almost surely, 2^16540613 is an apocalyptic number.

It is an amenable number.

16540613 is a deficient number, since it is larger than the sum of its proper divisors (1).

16540613 is an equidigital number, since it uses as much as digits as its factorization.

16540613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 16540613 is about 4067.0152446235. The cubic root of 16540613 is about 254.7908730107.

The spelling of 16540613 in words is "sixteen million, five hundred forty thousand, six hundred thirteen".