727079813 has 4 divisors (see below), whose sum is σ = 733750380. Its totient is φ = 720409248.

The previous prime is 727079807. The next prime is 727079827. The reversal of 727079813 is 318970727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 318970727 = 19 ⋅16787933.

It can be written as a sum of positive squares in 2 ways, for example, as 587674564 + 139405249 = 24242^2 + 11807^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-727079813 is a prime.

It is a super-2 number, since 2×727079813² = 1057290108944229938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (727079863) 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, 3335120 + ... + 3335337.

It is an arithmetic number, because the mean of its divisors is an integer number (183437595).

Almost surely, 2^727079813 is an apocalyptic number.

It is an amenable number.

727079813 is a deficient number, since it is larger than the sum of its proper divisors (6670567).

727079813 is a wasteful number, since it uses less digits than its factorization.

727079813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6670566.

The product of its (nonzero) digits is 148176, while the sum is 44.

The square root of 727079813 is about 26964.4175349663. The cubic root of 727079813 is about 899.2091047751.

The spelling of 727079813 in words is "seven hundred twenty-seven million, seventy-nine thousand, eight hundred thirteen".