722787601 has 4 divisors (see below), whose sum is σ = 730908900. Its totient is φ = 714666304.

The previous prime is 722787551. The next prime is 722787617. The reversal of 722787601 is 106787227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 106787227 = 59 ⋅1809953.

It can be written as a sum of positive squares in 2 ways, for example, as 225720576 + 497067025 = 15024^2 + 22295^2 .

It is a cyclic number.

It is not a de Polignac number, because 722787601 - 2¹⁹ = 722263313 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722787641) 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, 4060516 + ... + 4060693.

It is an arithmetic number, because the mean of its divisors is an integer number (182727225).

Almost surely, 2^722787601 is an apocalyptic number.

It is an amenable number.

722787601 is a deficient number, since it is larger than the sum of its proper divisors (8121299).

722787601 is an equidigital number, since it uses as much as digits as its factorization.

722787601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8121298.

The product of its (nonzero) digits is 65856, while the sum is 40.

The square root of 722787601 is about 26884.7094274794. The cubic root of 722787601 is about 897.4361605003.

The spelling of 722787601 in words is "seven hundred twenty-two million, seven hundred eighty-seven thousand, six hundred one".