721068969 has 8 divisors (see below), whose sum is σ = 961738272. Its totient is φ = 480556160.

The previous prime is 721068967. The next prime is 721068979. The reversal of 721068969 is 969860127.

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

It is a cyclic number.

It is not a de Polignac number, because 721068969 - 2¹ = 721068967 is a prime.

It is a super-2 number, since 2×721068969² = 1039880916109445922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (721068967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27912 + ... + 47129.

It is an arithmetic number, because the mean of its divisors is an integer number (120217284).

Almost surely, 2^721068969 is an apocalyptic number.

It is an amenable number.

721068969 is a deficient number, since it is larger than the sum of its proper divisors (240669303).

721068969 is a wasteful number, since it uses less digits than its factorization.

721068969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78247.

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 721068969 is about 26852.7274033756. The cubic root of 721068969 is about 896.7242931936.

The spelling of 721068969 in words is "seven hundred twenty-one million, sixty-eight thousand, nine hundred sixty-nine".