722417861 has 4 divisors (see below), whose sum is σ = 788092224. Its totient is φ = 656743500.

The previous prime is 722417837. The next prime is 722417863. The reversal of 722417861 is 168714227.

722417861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 722417861 - 2⁶ = 722417797 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 (722417863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32837165 + ... + 32837186.

It is an arithmetic number, because the mean of its divisors is an integer number (197023056).

Almost surely, 2^722417861 is an apocalyptic number.

It is an amenable number.

722417861 is a deficient number, since it is larger than the sum of its proper divisors (65674363).

722417861 is a wasteful number, since it uses less digits than its factorization.

722417861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65674362.

The product of its digits is 37632, while the sum is 38.

The square root of 722417861 is about 26877.8321484453. The cubic root of 722417861 is about 897.2831074034.

The spelling of 722417861 in words is "seven hundred twenty-two million, four hundred seventeen thousand, eight hundred sixty-one".