393934963 has 2 divisors, whose sum is σ = 393934964. Its totient is φ = 393934962.

The previous prime is 393934921. The next prime is 393934973. The reversal of 393934963 is 369439393.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 393934963 - 2⁹ = 393934451 is a prime.

It is a super-2 number, since 2×393934963² = 310369510147622738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (393934973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196967481 + 196967482.

It is an arithmetic number, because the mean of its divisors is an integer number (196967482).

Almost surely, 2^393934963 is an apocalyptic number.

393934963 is a deficient number, since it is larger than the sum of its proper divisors (1).

393934963 is an equidigital number, since it uses as much as digits as its factorization.

393934963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1417176, while the sum is 49.

The square root of 393934963 is about 19847.7949153048. The cubic root of 393934963 is about 733.0633533497.

The spelling of 393934963 in words is "three hundred ninety-three million, nine hundred thirty-four thousand, nine hundred sixty-three".