72541613 has 4 divisors (see below), whose sum is σ = 73219680. Its totient is φ = 71863548.

The previous prime is 72541541. The next prime is 72541619. The reversal of 72541613 is 31614527.

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 a cyclic number.

It is not a de Polignac number, because 72541613 - 2²² = 68347309 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 (72541619) 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, 338873 + ... + 339086.

It is an arithmetic number, because the mean of its divisors is an integer number (18304920).

Almost surely, 2^72541613 is an apocalyptic number.

It is an amenable number.

72541613 is a deficient number, since it is larger than the sum of its proper divisors (678067).

72541613 is a wasteful number, since it uses less digits than its factorization.

72541613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678066.

The product of its digits is 5040, while the sum is 29.

The square root of 72541613 is about 8517.1364319236. The cubic root of 72541613 is about 417.0573083810.

The spelling of 72541613 in words is "seventy-two million, five hundred forty-one thousand, six hundred thirteen".