731993506 has 8 divisors (see below), whose sum is σ = 1155779280. Its totient is φ = 346733748.

The previous prime is 731993501. The next prime is 731993519. The reversal of 731993506 is 605399137.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (731993501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9631456 + ... + 9631531.

It is an arithmetic number, because the mean of its divisors is an integer number (144472410).

Almost surely, 2^731993506 is an apocalyptic number.

731993506 is a deficient number, since it is larger than the sum of its proper divisors (423785774).

731993506 is a wasteful number, since it uses less digits than its factorization.

731993506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19263008.

The product of its (nonzero) digits is 153090, while the sum is 43.

The square root of 731993506 is about 27055.3785040978. The cubic root of 731993506 is about 901.2302131245.

The spelling of 731993506 in words is "seven hundred thirty-one million, nine hundred ninety-three thousand, five hundred six".