721422079 has 8 divisors (see below), whose sum is σ = 825046560. Its totient is φ = 617938656.

The previous prime is 721422073. The next prime is 721422083. The reversal of 721422079 is 970224127.

It is a happy number.

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 721422079 - 2¹¹ = 721420031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721422073) 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, 24064 + ... + 44965.

It is an arithmetic number, because the mean of its divisors is an integer number (103130820).

Almost surely, 2^721422079 is an apocalyptic number.

721422079 is a deficient number, since it is larger than the sum of its proper divisors (103624481).

721422079 is a wasteful number, since it uses less digits than its factorization.

721422079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70529.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 721422079 is about 26859.3015359670. The cubic root of 721422079 is about 896.8706456490.

The spelling of 721422079 in words is "seven hundred twenty-one million, four hundred twenty-two thousand, seventy-nine".