87998469 has 24 divisors (see below), whose sum is σ = 130512672. Its totient is φ = 52678080.

The previous prime is 87998467. The next prime is 87998489. The reversal of 87998469 is 96489978.

It is not a de Polignac number, because 87998469 - 2¹ = 87998467 is a prime.

It is a super-2 number, since 2×87998469² = 15487461092687922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87998467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16414 + ... + 21104.

It is an arithmetic number, because the mean of its divisors is an integer number (5438028).

Almost surely, 2^87998469 is an apocalyptic number.

It is an amenable number.

87998469 is a deficient number, since it is larger than the sum of its proper divisors (42514203).

87998469 is a wasteful number, since it uses less digits than its factorization.

87998469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4757 (or 4744 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 60.

The square root of 87998469 is about 9380.7499167177. The cubic root of 87998469 is about 444.7934386190.

The spelling of 87998469 in words is "eighty-seven million, nine hundred ninety-eight thousand, four hundred sixty-nine".