393112861 has 2 divisors, whose sum is σ = 393112862. Its totient is φ = 393112860.

The previous prime is 393112813. The next prime is 393112873. The reversal of 393112861 is 168211393.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 243172836 + 149940025 = 15594^2 + 12245^2 .

It is a cyclic number.

It is not a de Polignac number, because 393112861 - 2¹¹ = 393110813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (393112561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196556430 + 196556431.

It is an arithmetic number, because the mean of its divisors is an integer number (196556431).

Almost surely, 2^393112861 is an apocalyptic number.

It is an amenable number.

393112861 is a deficient number, since it is larger than the sum of its proper divisors (1).

393112861 is an equidigital number, since it uses as much as digits as its factorization.

393112861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 34.

The square root of 393112861 is about 19827.0739394395. The cubic root of 393112861 is about 732.5530554433.

The spelling of 393112861 in words is "three hundred ninety-three million, one hundred twelve thousand, eight hundred sixty-one".