87653243 has 2 divisors, whose sum is σ = 87653244. Its totient is φ = 87653242.

The previous prime is 87653239. The next prime is 87653281. The reversal of 87653243 is 34235678.

It is an a-pointer prime, because the next prime (87653281) can be obtained adding 87653243 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87653243 - 2² = 87653239 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 87653197 and 87653206.

It is not a weakly prime, because it can be changed into another prime (87653443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43826621 + 43826622.

It is an arithmetic number, because the mean of its divisors is an integer number (43826622).

Almost surely, 2^87653243 is an apocalyptic number.

87653243 is a deficient number, since it is larger than the sum of its proper divisors (1).

87653243 is an equidigital number, since it uses as much as digits as its factorization.

87653243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 38.

The square root of 87653243 is about 9362.3310665667. The cubic root of 87653243 is about 444.2110212859.

The spelling of 87653243 in words is "eighty-seven million, six hundred fifty-three thousand, two hundred forty-three".