72180587 has 2 divisors, whose sum is σ = 72180588. Its totient is φ = 72180586.

The previous prime is 72180569. The next prime is 72180611. The reversal of 72180587 is 78508127.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72180587 - 2¹² = 72176491 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72180587.

It is not a weakly prime, because it can be changed into another prime (72180527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36090293 + 36090294.

It is an arithmetic number, because the mean of its divisors is an integer number (36090294).

Almost surely, 2^72180587 is an apocalyptic number.

72180587 is a deficient number, since it is larger than the sum of its proper divisors (1).

72180587 is an equidigital number, since it uses as much as digits as its factorization.

72180587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 72180587 is about 8495.9159011845. The cubic root of 72180587 is about 416.3642854283.

The spelling of 72180587 in words is "seventy-two million, one hundred eighty thousand, five hundred eighty-seven".