721967682 has 8 divisors (see below), whose sum is σ = 1443935376. Its totient is φ = 240655892.

The previous prime is 721967663. The next prime is 721967683. The reversal of 721967682 is 286769127.

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

721967682 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (721967683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60163968 + ... + 60163979.

It is an arithmetic number, because the mean of its divisors is an integer number (180491922).

Almost surely, 2^721967682 is an apocalyptic number.

721967682 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

721967682 is a wasteful number, since it uses less digits than its factorization.

721967682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120327952.

The product of its digits is 508032, while the sum is 48.

The square root of 721967682 is about 26869.4563026497. The cubic root of 721967682 is about 897.0966862344.

The spelling of 721967682 in words is "seven hundred twenty-one million, nine hundred sixty-seven thousand, six hundred eighty-two".