87422567 has 2 divisors, whose sum is σ = 87422568. Its totient is φ = 87422566.

The previous prime is 87422557. The next prime is 87422581. The reversal of 87422567 is 76522478.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87422567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87422557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43711283 + 43711284.

It is an arithmetic number, because the mean of its divisors is an integer number (43711284).

Almost surely, 2^87422567 is an apocalyptic number.

87422567 is a deficient number, since it is larger than the sum of its proper divisors (1).

87422567 is an equidigital number, since it uses as much as digits as its factorization.

87422567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 188160, while the sum is 41.

The square root of 87422567 is about 9350.0035828870. The cubic root of 87422567 is about 443.8210039922.

The spelling of 87422567 in words is "eighty-seven million, four hundred twenty-two thousand, five hundred sixty-seven".