87647243 has 2 divisors, whose sum is σ = 87647244. Its totient is φ = 87647242.

The previous prime is 87647233. The next prime is 87647249. The reversal of 87647243 is 34274678.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87647243 - 2⁸ = 87646987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87647243.

It is not a weakly prime, because it can be changed into another prime (87647249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43823621 + 43823622.

It is an arithmetic number, because the mean of its divisors is an integer number (43823622).

Almost surely, 2^87647243 is an apocalyptic number.

87647243 is a deficient number, since it is larger than the sum of its proper divisors (1).

87647243 is an equidigital number, since it uses as much as digits as its factorization.

87647243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 41.

The square root of 87647243 is about 9362.0106280649. The cubic root of 87647243 is about 444.2008854109.

The spelling of 87647243 in words is "eighty-seven million, six hundred forty-seven thousand, two hundred forty-three".