393884941 has 2 divisors, whose sum is σ = 393884942. Its totient is φ = 393884940.

The previous prime is 393884929. The next prime is 393884947. The reversal of 393884941 is 149488393.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 382358916 + 11526025 = 19554^2 + 3395^2 .

It is an emirp because it is prime and its reverse (149488393) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-393884941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (393884947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196942470 + 196942471.

It is an arithmetic number, because the mean of its divisors is an integer number (196942471).

Almost surely, 2^393884941 is an apocalyptic number.

It is an amenable number.

393884941 is a deficient number, since it is larger than the sum of its proper divisors (1).

393884941 is an equidigital number, since it uses as much as digits as its factorization.

393884941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 49.

The square root of 393884941 is about 19846.5347353134. The cubic root of 393884941 is about 733.0323238222.

The spelling of 393884941 in words is "three hundred ninety-three million, eight hundred eighty-four thousand, nine hundred forty-one".