216292693 has 2 divisors, whose sum is σ = 216292694. Its totient is φ = 216292692.

The previous prime is 216292669. The next prime is 216292711. The reversal of 216292693 is 396292612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211789809 + 4502884 = 14553^2 + 2122^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216292693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216292603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108146346 + 108146347.

It is an arithmetic number, because the mean of its divisors is an integer number (108146347).

Almost surely, 2^216292693 is an apocalyptic number.

It is an amenable number.

216292693 is a deficient number, since it is larger than the sum of its proper divisors (1).

216292693 is an equidigital number, since it uses as much as digits as its factorization.

216292693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 40.

The square root of 216292693 is about 14706.8927037631. The cubic root of 216292693 is about 600.2708897166.

The spelling of 216292693 in words is "two hundred sixteen million, two hundred ninety-two thousand, six hundred ninety-three".