394722733 has 2 divisors, whose sum is σ = 394722734. Its totient is φ = 394722732.

The previous prime is 394722707. The next prime is 394722749. The reversal of 394722733 is 337227493.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 369139369 + 25583364 = 19213^2 + 5058^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-394722733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394722763) 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, 197361366 + 197361367.

It is an arithmetic number, because the mean of its divisors is an integer number (197361367).

Almost surely, 2^394722733 is an apocalyptic number.

It is an amenable number.

394722733 is a deficient number, since it is larger than the sum of its proper divisors (1).

394722733 is an equidigital number, since it uses as much as digits as its factorization.

394722733 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 40.

The square root of 394722733 is about 19867.6302814402. The cubic root of 394722733 is about 733.5516749068.

The spelling of 394722733 in words is "three hundred ninety-four million, seven hundred twenty-two thousand, seven hundred thirty-three".