721693692 has 24 divisors (see below), whose sum is σ = 1871058000. Its totient is φ = 240564528.

The previous prime is 721693667. The next prime is 721693697. The reversal of 721693692 is 296396127.

It is a happy number.

721693692 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721693697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3341067 + ... + 3341282.

It is an arithmetic number, because the mean of its divisors is an integer number (77960750).

Almost surely, 2^721693692 is an apocalyptic number.

It is an amenable number.

721693692 is an abundant number, since it is smaller than the sum of its proper divisors (1149364308).

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

721693692 is a wasteful number, since it uses less digits than its factorization.

721693692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6682362 (or 6682354 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 721693692 is about 26864.3572787439. The cubic root of 721693692 is about 896.9831877924.

The spelling of 721693692 in words is "seven hundred twenty-one million, six hundred ninety-three thousand, six hundred ninety-two".