72236641 has 4 divisors (see below), whose sum is σ = 72294400. Its totient is φ = 72178884.

The previous prime is 72236611. The next prime is 72236683. The reversal of 72236641 is 14663227.

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 72236641 - 2⁵ = 72236609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72236611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26961 + ... + 29518.

It is an arithmetic number, because the mean of its divisors is an integer number (18073600).

Almost surely, 2^72236641 is an apocalyptic number.

It is an amenable number.

72236641 is a deficient number, since it is larger than the sum of its proper divisors (57759).

72236641 is a wasteful number, since it uses less digits than its factorization.

72236641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57758.

The product of its digits is 12096, while the sum is 31.

The square root of 72236641 is about 8499.2141401426. The cubic root of 72236641 is about 416.4720375988.

Adding to 72236641 its reverse (14663227), we get a palindrome (86899868).

The spelling of 72236641 in words is "seventy-two million, two hundred thirty-six thousand, six hundred forty-one".