72204647 has 2 divisors, whose sum is σ = 72204648. Its totient is φ = 72204646.

The previous prime is 72204641. The next prime is 72204677. The reversal of 72204647 is 74640227.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72204647 - 2¹⁰ = 72203623 is a prime.

It is a super-2 number, since 2×72204647² = 10427022096789218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72204641) 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, 36102323 + 36102324.

It is an arithmetic number, because the mean of its divisors is an integer number (36102324).

Almost surely, 2^72204647 is an apocalyptic number.

72204647 is a deficient number, since it is larger than the sum of its proper divisors (1).

72204647 is an equidigital number, since it uses as much as digits as its factorization.

72204647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 32.

The square root of 72204647 is about 8497.3317576755. The cubic root of 72204647 is about 416.4105426112.

The spelling of 72204647 in words is "seventy-two million, two hundred four thousand, six hundred forty-seven".