72246289 has 4 divisors (see below), whose sum is σ = 75387456. Its totient is φ = 69105124.

The previous prime is 72246283. The next prime is 72246299. The reversal of 72246289 is 98264227.

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 72246289 - 2³ = 72246281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72246281) 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, 1570549 + ... + 1570594.

It is an arithmetic number, because the mean of its divisors is an integer number (18846864).

Almost surely, 2^72246289 is an apocalyptic number.

It is an amenable number.

72246289 is a deficient number, since it is larger than the sum of its proper divisors (3141167).

72246289 is a wasteful number, since it uses less digits than its factorization.

72246289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3141166.

The product of its digits is 96768, while the sum is 40.

The square root of 72246289 is about 8499.7817030792. The cubic root of 72246289 is about 416.4905782511.

The spelling of 72246289 in words is "seventy-two million, two hundred forty-six thousand, two hundred eighty-nine".