72613105 has 4 divisors (see below), whose sum is σ = 87135732. Its totient is φ = 58090480.

The previous prime is 72613097. The next prime is 72613109. The reversal of 72613105 is 50131627.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14837904 + 57775201 = 3852^2 + 7601^2 .

It is not a de Polignac number, because 72613105 - 2³ = 72613097 is a prime.

It is a super-3 number, since 3×72613105³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72613105.

It is not an unprimeable number, because it can be changed into a prime (72613109) 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, 7261306 + ... + 7261315.

It is an arithmetic number, because the mean of its divisors is an integer number (21783933).

Almost surely, 2^72613105 is an apocalyptic number.

It is an amenable number.

72613105 is a deficient number, since it is larger than the sum of its proper divisors (14522627).

72613105 is a wasteful number, since it uses less digits than its factorization.

72613105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14522626.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 72613105 is about 8521.3323488760. The cubic root of 72613105 is about 417.1942710166.

It can be divided in two parts, 726 and 13105, that added together give a palindrome (13831).

The spelling of 72613105 in words is "seventy-two million, six hundred thirteen thousand, one hundred five".