209793893 has 4 divisors (see below), whose sum is σ = 209891328. Its totient is φ = 209696460.

The previous prime is 209793869. The next prime is 209793931. The reversal of 209793893 is 398397902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 209793893 - 2¹⁶ = 209728357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209793863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45413 + ... + 49818.

It is an arithmetic number, because the mean of its divisors is an integer number (52472832).

Almost surely, 2^209793893 is an apocalyptic number.

It is an amenable number.

209793893 is a deficient number, since it is larger than the sum of its proper divisors (97435).

209793893 is an equidigital number, since it uses as much as digits as its factorization.

209793893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97434.

The product of its (nonzero) digits is 734832, while the sum is 50.

The square root of 209793893 is about 14484.2636333367. The cubic root of 209793893 is about 594.1976738586.

The spelling of 209793893 in words is "two hundred nine million, seven hundred ninety-three thousand, eight hundred ninety-three".