722676613 has 4 divisors (see below), whose sum is σ = 765187020. Its totient is φ = 680166208.

The previous prime is 722676593. The next prime is 722676631. The reversal of 722676613 is 316676227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 316676227 = 7 ⋅45239461.

It can be written as a sum of positive squares in 2 ways, for example, as 654234084 + 68442529 = 25578^2 + 8273^2 .

It is a cyclic number.

It is not a de Polignac number, because 722676613 - 2¹³ = 722668421 is a prime.

It is a super-2 number, since 2×722676613² = 1044522973954303538, which contains 22 as substring.

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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722676113) 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, 21255178 + ... + 21255211.

It is an arithmetic number, because the mean of its divisors is an integer number (191296755).

Almost surely, 2^722676613 is an apocalyptic number.

It is an amenable number.

722676613 is a deficient number, since it is larger than the sum of its proper divisors (42510407).

722676613 is a wasteful number, since it uses less digits than its factorization.

722676613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42510406.

The product of its digits is 127008, while the sum is 40.

The square root of 722676613 is about 26882.6452009470. The cubic root of 722676613 is about 897.3902227342.

The spelling of 722676613 in words is "seven hundred twenty-two million, six hundred seventy-six thousand, six hundred thirteen".