16573813 has 2 divisors, whose sum is σ = 16573814. Its totient is φ = 16573812.

The previous prime is 16573801. The next prime is 16573829. The reversal of 16573813 is 31837561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12545764 + 4028049 = 3542^2 + 2007^2 .

It is a cyclic number.

It is not a de Polignac number, because 16573813 - 2²¹ = 14476661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16573853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8286906 + 8286907.

It is an arithmetic number, because the mean of its divisors is an integer number (8286907).

Almost surely, 2^16573813 is an apocalyptic number.

It is an amenable number.

16573813 is a deficient number, since it is larger than the sum of its proper divisors (1).

16573813 is an equidigital number, since it uses as much as digits as its factorization.

16573813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 34.

The square root of 16573813 is about 4071.0948158941. The cubic root of 16573813 is about 254.9612295279.

The spelling of 16573813 in words is "sixteen million, five hundred seventy-three thousand, eight hundred thirteen".