87222697 has 2 divisors, whose sum is σ = 87222698. Its totient is φ = 87222696.

The previous prime is 87222661. The next prime is 87222701. The reversal of 87222697 is 79622278.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87216921 + 5776 = 9339^2 + 76^2 .

It is a cyclic number.

It is not a de Polignac number, because 87222697 - 2¹¹ = 87220649 is a prime.

It is not a weakly prime, because it can be changed into another prime (87222617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43611348 + 43611349.

It is an arithmetic number, because the mean of its divisors is an integer number (43611349).

Almost surely, 2^87222697 is an apocalyptic number.

It is an amenable number.

87222697 is a deficient number, since it is larger than the sum of its proper divisors (1).

87222697 is an equidigital number, since it uses as much as digits as its factorization.

87222697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 43.

The square root of 87222697 is about 9339.3092356983. The cubic root of 87222697 is about 443.4825170511.

It can be divided in two parts, 87 and 222697, that added together give a square (222784 = 472²).

The spelling of 87222697 in words is "eighty-seven million, two hundred twenty-two thousand, six hundred ninety-seven".