731704993 has 2 divisors, whose sum is σ = 731704994. Its totient is φ = 731704992.

The previous prime is 731704979. The next prime is 731704999. The reversal of 731704993 is 399407137.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 504811024 + 226893969 = 22468^2 + 15063^2 .

It is a cyclic number.

It is not a de Polignac number, because 731704993 - 2²¹ = 729607841 is a prime.

It is a super-2 number, since 2×731704993² = 1070784393562260098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (731704999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365852496 + 365852497.

It is an arithmetic number, because the mean of its divisors is an integer number (365852497).

Almost surely, 2^731704993 is an apocalyptic number.

It is an amenable number.

731704993 is a deficient number, since it is larger than the sum of its proper divisors (1).

731704993 is an equidigital number, since it uses as much as digits as its factorization.

731704993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 142884, while the sum is 43.

The square root of 731704993 is about 27050.0460812916. The cubic root of 731704993 is about 901.1117918546. Note that the first 3 decimals are identical.

The spelling of 731704993 in words is "seven hundred thirty-one million, seven hundred four thousand, nine hundred ninety-three".