87842223 has 12 divisors (see below), whose sum is σ = 145009488. Its totient is φ = 50195520.

The previous prime is 87842207. The next prime is 87842243. The reversal of 87842223 is 32224878.

It is not a de Polignac number, because 87842223 - 2⁴ = 87842207 is a prime.

It is a super-2 number, since 2×87842223² = 15432512283163458, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87842203) 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 in 11 ways as a sum of consecutive naturals, for example, 697098 + ... + 697223.

It is an arithmetic number, because the mean of its divisors is an integer number (12084124).

Almost surely, 2^87842223 is an apocalyptic number.

87842223 is a deficient number, since it is larger than the sum of its proper divisors (57167265).

87842223 is a wasteful number, since it uses less digits than its factorization.

87842223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394334 (or 1394331 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 87842223 is about 9372.4182044977. The cubic root of 87842223 is about 444.5300311263.

The spelling of 87842223 in words is "eighty-seven million, eight hundred forty-two thousand, two hundred twenty-three".