721769852 has 12 divisors (see below), whose sum is σ = 1263834936. Its totient is φ = 360674160.

The previous prime is 721769849. The next prime is 721769879. The reversal of 721769852 is 258967127.

It is a happy number.

721769852 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×721769852² = 1041903438512203808, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 721769797 and 721769806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44858 + ... + 58785.

It is an arithmetic number, because the mean of its divisors is an integer number (105319578).

Almost surely, 2^721769852 is an apocalyptic number.

It is an amenable number.

721769852 is a deficient number, since it is larger than the sum of its proper divisors (542065084).

721769852 is a wasteful number, since it uses less digits than its factorization.

721769852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105388 (or 105386 counting only the distinct ones).

The product of its digits is 423360, while the sum is 47.

The square root of 721769852 is about 26865.7747329199. The cubic root of 721769852 is about 897.0147394222.

It can be divided in two parts, 72176 and 9852, that added together give a palindrome (82028).

The spelling of 721769852 in words is "seven hundred twenty-one million, seven hundred sixty-nine thousand, eight hundred fifty-two".