87668473 has 4 divisors (see below), whose sum is σ = 92825460. Its totient is φ = 82511488.

The previous prime is 87668467. The next prime is 87668491. The reversal of 87668473 is 37486678.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67848169 + 19820304 = 8237^2 + 4452^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87668473 is a prime.

It is a super-2 number, since 2×87668473² = 15371522316303458, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87668423) 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 3 ways as a sum of consecutive naturals, for example, 2578468 + ... + 2578501.

It is an arithmetic number, because the mean of its divisors is an integer number (23206365).

Almost surely, 2^87668473 is an apocalyptic number.

It is an amenable number.

87668473 is a deficient number, since it is larger than the sum of its proper divisors (5156987).

87668473 is a wasteful number, since it uses less digits than its factorization.

87668473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5156986.

The product of its digits is 1354752, while the sum is 49.

The square root of 87668473 is about 9363.1443970495. The cubic root of 87668473 is about 444.2367474383.

The spelling of 87668473 in words is "eighty-seven million, six hundred sixty-eight thousand, four hundred seventy-three".