87822277 has 2 divisors, whose sum is σ = 87822278. Its totient is φ = 87822276.

The previous prime is 87822271. The next prime is 87822299. The reversal of 87822277 is 77222878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68409441 + 19412836 = 8271^2 + 4406^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87822277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87822271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43911138 + 43911139.

It is an arithmetic number, because the mean of its divisors is an integer number (43911139).

Almost surely, 2^87822277 is an apocalyptic number.

It is an amenable number.

87822277 is a deficient number, since it is larger than the sum of its proper divisors (1).

87822277 is an equidigital number, since it uses as much as digits as its factorization.

87822277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 175616, while the sum is 43.

The square root of 87822277 is about 9371.3540643815. The cubic root of 87822277 is about 444.4963826640.

The spelling of 87822277 in words is "eighty-seven million, eight hundred twenty-two thousand, two hundred seventy-seven".