72887081 has 2 divisors, whose sum is σ = 72887082. Its totient is φ = 72887080.

The previous prime is 72887057. The next prime is 72887099. The reversal of 72887081 is 18078827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50410000 + 22477081 = 7100^2 + 4741^2 .

It is a cyclic number.

It is not a de Polignac number, because 72887081 - 2¹⁴ = 72870697 is a prime.

It is a super-2 number, since 2×72887081² = 10625053153401122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (72887011) 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 as a sum of consecutive naturals, namely, 36443540 + 36443541.

It is an arithmetic number, because the mean of its divisors is an integer number (36443541).

Almost surely, 2^72887081 is an apocalyptic number.

It is an amenable number.

72887081 is a deficient number, since it is larger than the sum of its proper divisors (1).

72887081 is an equidigital number, since it uses as much as digits as its factorization.

72887081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50176, while the sum is 41.

The square root of 72887081 is about 8537.3931032839. The cubic root of 72887081 is about 417.7183167417.

The spelling of 72887081 in words is "seventy-two million, eight hundred eighty-seven thousand, eighty-one".