722424657 has 4 divisors (see below), whose sum is σ = 963232880. Its totient is φ = 481616436.

The previous prime is 722424653. The next prime is 722424671. The reversal of 722424657 is 756424227.

It is a happy number.

722424657 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 not a de Polignac number, because 722424657 - 2² = 722424653 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722424653) 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, 120404107 + ... + 120404112.

It is an arithmetic number, because the mean of its divisors is an integer number (240808220).

Almost surely, 2^722424657 is an apocalyptic number.

It is an amenable number.

722424657 is a deficient number, since it is larger than the sum of its proper divisors (240808223).

722424657 is a wasteful number, since it uses less digits than its factorization.

722424657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240808222.

The product of its digits is 188160, while the sum is 39.

The square root of 722424657 is about 26877.9585720344. The cubic root of 722424657 is about 897.2859210644.

The spelling of 722424657 in words is "seven hundred twenty-two million, four hundred twenty-four thousand, six hundred fifty-seven".