87840099 has 16 divisors (see below), whose sum is σ = 133161600. Its totient is φ = 57197448.

The previous prime is 87840091. The next prime is 87840107. The reversal of 87840099 is 99004878.

It is an interprime number because it is at equal distance from previous prime (87840091) and next prime (87840107).

It is not a de Polignac number, because 87840099 - 2³ = 87840091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87840091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36669 + ... + 38990.

It is an arithmetic number, because the mean of its divisors is an integer number (8322600).

Almost surely, 2^87840099 is an apocalyptic number.

87840099 is a deficient number, since it is larger than the sum of its proper divisors (45321501).

87840099 is a wasteful number, since it uses less digits than its factorization.

87840099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75711 (or 75705 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 87840099 is about 9372.3048926078. The cubic root of 87840099 is about 444.5264482275.

The spelling of 87840099 in words is "eighty-seven million, eight hundred forty thousand, ninety-nine".