393145943 has 2 divisors, whose sum is σ = 393145944. Its totient is φ = 393145942.

The previous prime is 393145939. The next prime is 393145981. The reversal of 393145943 is 349541393.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 393145943 - 2² = 393145939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 393145943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (393145903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196572971 + 196572972.

It is an arithmetic number, because the mean of its divisors is an integer number (196572972).

Almost surely, 2^393145943 is an apocalyptic number.

393145943 is a deficient number, since it is larger than the sum of its proper divisors (1).

393145943 is an equidigital number, since it uses as much as digits as its factorization.

393145943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 41.

The square root of 393145943 is about 19827.9081851818. The cubic root of 393145943 is about 732.5736039446.

The spelling of 393145943 in words is "three hundred ninety-three million, one hundred forty-five thousand, nine hundred forty-three".