721876106 has 16 divisors (see below), whose sum is σ = 1277422080. Its totient is φ = 299395440.

The previous prime is 721876087. The next prime is 721876121. The reversal of 721876106 is 601678127.

It is a super-2 number, since 2×721876106² = 1042210224827446472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 721876106.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 831221 + ... + 832088.

It is an arithmetic number, because the mean of its divisors is an integer number (79838880).

Almost surely, 2^721876106 is an apocalyptic number.

721876106 is a deficient number, since it is larger than the sum of its proper divisors (555545974).

721876106 is a wasteful number, since it uses less digits than its factorization.

721876106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1663349.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 721876106 is about 26867.7521575587. The cubic root of 721876106 is about 897.0587547120.

The spelling of 721876106 in words is "seven hundred twenty-one million, eight hundred seventy-six thousand, one hundred six".