72217089 has 40 divisors (see below), whose sum is σ = 125197248. Its totient is φ = 40629600.

The previous prime is 72217087. The next prime is 72217091. The reversal of 72217089 is 98071227.

It is an interprime number because it is at equal distance from previous prime (72217087) and next prime (72217091).

It is not a de Polignac number, because 72217089 - 2¹ = 72217087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72217087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 37039 + ... + 38939.

Almost surely, 2^72217089 is an apocalyptic number.

It is an amenable number.

72217089 is a deficient number, since it is larger than the sum of its proper divisors (52980159).

72217089 is a wasteful number, since it uses less digits than its factorization.

72217089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1987 (or 1978 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 72217089 is about 8498.0638383105. The cubic root of 72217089 is about 416.4344592732.

The spelling of 72217089 in words is "seventy-two million, two hundred seventeen thousand, eighty-nine".