721967411 has 16 divisors (see below), whose sum is σ = 807676800. Its totient is φ = 639809280.

The previous prime is 721967387. The next prime is 721967417. The reversal of 721967411 is 114769127.

It is not a de Polignac number, because 721967411 - 2²² = 717773107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (721967417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66440 + ... + 76538.

It is an arithmetic number, because the mean of its divisors is an integer number (50479800).

Almost surely, 2^721967411 is an apocalyptic number.

721967411 is a deficient number, since it is larger than the sum of its proper divisors (85709389).

721967411 is a wasteful number, since it uses less digits than its factorization.

721967411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10274.

The product of its digits is 21168, while the sum is 38.

The square root of 721967411 is about 26869.4512597485. The cubic root of 721967411 is about 897.0965739887.

The spelling of 721967411 in words is "seven hundred twenty-one million, nine hundred sixty-seven thousand, four hundred eleven".