72113361 has 4 divisors (see below), whose sum is σ = 96151152. Its totient is φ = 48075572.

The previous prime is 72113359. The next prime is 72113411. The reversal of 72113361 is 16331127.

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 72113361 - 2¹ = 72113359 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72113861) 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, 12018891 + ... + 12018896.

It is an arithmetic number, because the mean of its divisors is an integer number (24037788).

Almost surely, 2^72113361 is an apocalyptic number.

It is an amenable number.

72113361 is a deficient number, since it is larger than the sum of its proper divisors (24037791).

72113361 is a wasteful number, since it uses less digits than its factorization.

72113361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24037790.

The product of its digits is 756, while the sum is 24.

The square root of 72113361 is about 8491.9586080009. The cubic root of 72113361 is about 416.2349838120.

Adding to 72113361 its reverse (16331127), we get a palindrome (88444488).

The spelling of 72113361 in words is "seventy-two million, one hundred thirteen thousand, three hundred sixty-one".