16689593 has 2 divisors, whose sum is σ = 16689594. Its totient is φ = 16689592.

The previous prime is 16689523. The next prime is 16689599. The reversal of 16689593 is 39598661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8832784 + 7856809 = 2972^2 + 2803^2 .

It is a cyclic number.

It is not a de Polignac number, because 16689593 - 2¹⁰ = 16688569 is a prime.

It is not a weakly prime, because it can be changed into another prime (16689599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8344796 + 8344797.

It is an arithmetic number, because the mean of its divisors is an integer number (8344797).

Almost surely, 2^16689593 is an apocalyptic number.

It is an amenable number.

16689593 is a deficient number, since it is larger than the sum of its proper divisors (1).

16689593 is an equidigital number, since it uses as much as digits as its factorization.

16689593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 47.

The square root of 16689593 is about 4085.2898305995. The cubic root of 16689593 is about 255.5535482374.

The spelling of 16689593 in words is "sixteen million, six hundred eighty-nine thousand, five hundred ninety-three".