72358613 has 4 divisors (see below), whose sum is σ = 76615020. Its totient is φ = 68102208.

The previous prime is 72358609. The next prime is 72358679. The reversal of 72358613 is 31685327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31685327 = 179 ⋅177013.

It can be written as a sum of positive squares in 2 ways, for example, as 65399569 + 6959044 = 8087^2 + 2638^2 .

It is a cyclic number.

It is not a de Polignac number, because 72358613 - 2² = 72358609 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 (72358313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2128178 + ... + 2128211.

It is an arithmetic number, because the mean of its divisors is an integer number (19153755).

Almost surely, 2^72358613 is an apocalyptic number.

It is an amenable number.

72358613 is a deficient number, since it is larger than the sum of its proper divisors (4256407).

72358613 is a wasteful number, since it uses less digits than its factorization.

72358613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4256406.

The product of its digits is 30240, while the sum is 35.

The square root of 72358613 is about 8506.3866006666. The cubic root of 72358613 is about 416.7063109656.

The spelling of 72358613 in words is "seventy-two million, three hundred fifty-eight thousand, six hundred thirteen".