87222643 has 2 divisors, whose sum is σ = 87222644. Its totient is φ = 87222642.

The previous prime is 87222637. The next prime is 87222661. The reversal of 87222643 is 34622278.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87222643 - 2¹³ = 87214451 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87222599 and 87222608.

It is not a weakly prime, because it can be changed into another prime (87222613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43611321 + 43611322.

It is an arithmetic number, because the mean of its divisors is an integer number (43611322).

Almost surely, 2^87222643 is an apocalyptic number.

87222643 is a deficient number, since it is larger than the sum of its proper divisors (1).

87222643 is an equidigital number, since it uses as much as digits as its factorization.

87222643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 34.

The square root of 87222643 is about 9339.3063446918. The cubic root of 87222643 is about 443.4824255303.

The spelling of 87222643 in words is "eighty-seven million, two hundred twenty-two thousand, six hundred forty-three".