87822773 has 2 divisors, whose sum is σ = 87822774. Its totient is φ = 87822772.

The previous prime is 87822767. The next prime is 87822781. The reversal of 87822773 is 37722878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87179569 + 643204 = 9337^2 + 802^2 .

It is a cyclic number.

It is not a de Polignac number, because 87822773 - 2¹² = 87818677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87822173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43911386 + 43911387.

It is an arithmetic number, because the mean of its divisors is an integer number (43911387).

Almost surely, 2^87822773 is an apocalyptic number.

It is an amenable number.

87822773 is a deficient number, since it is larger than the sum of its proper divisors (1).

87822773 is an equidigital number, since it uses as much as digits as its factorization.

87822773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 263424, while the sum is 44.

The square root of 87822773 is about 9371.3805279692. The cubic root of 87822773 is about 444.4972194668.

The spelling of 87822773 in words is "eighty-seven million, eight hundred twenty-two thousand, seven hundred seventy-three".