72217619 has 2 divisors, whose sum is σ = 72217620. Its totient is φ = 72217618.

The previous prime is 72217601. The next prime is 72217633. The reversal of 72217619 is 91671227.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72217619 is a prime.

It is a super-2 number, since 2×72217619² = 10430768988058322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72217679) 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 as a sum of consecutive naturals, namely, 36108809 + 36108810.

It is an arithmetic number, because the mean of its divisors is an integer number (36108810).

Almost surely, 2^72217619 is an apocalyptic number.

72217619 is a deficient number, since it is larger than the sum of its proper divisors (1).

72217619 is an equidigital number, since it uses as much as digits as its factorization.

72217619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584, while the sum is 35.

The square root of 72217619 is about 8498.0950218270. The cubic root of 72217619 is about 416.4354780058.

The spelling of 72217619 in words is "seventy-two million, two hundred seventeen thousand, six hundred nineteen".