99988667 has 4 divisors (see below), whose sum is σ = 101019576. Its totient is φ = 98957760.

The previous prime is 99988649. The next prime is 99988753. The reversal of 99988667 is 76688999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76688999 = 227 ⋅337837.

It is a cyclic number.

It is not a de Polignac number, because 99988667 - 2²⁰ = 98940091 is a prime.

It is a super-3 number, since 3×99988667³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99988367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 515309 + ... + 515502.

It is an arithmetic number, because the mean of its divisors is an integer number (25254894).

Almost surely, 2^99988667 is an apocalyptic number.

99988667 is a gapful number since it is divisible by the number (97) formed by its first and last digit.

99988667 is a deficient number, since it is larger than the sum of its proper divisors (1030909).

99988667 is a wasteful number, since it uses less digits than its factorization.

99988667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030908.

The product of its digits is 11757312, while the sum is 62.

The square root of 99988667 is about 9999.4333339445. The cubic root of 99988667 is about 464.1413483234.

The spelling of 99988667 in words is "ninety-nine million, nine hundred eighty-eight thousand, six hundred sixty-seven".