87409911 has 8 divisors (see below), whose sum is σ = 116764144. Its totient is φ = 58164480.

The previous prime is 87409877. The next prime is 87409943. The reversal of 87409911 is 11990478.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87409911 - 2⁷ = 87409783 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87409911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87402911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25306 + ... + 28551.

It is an arithmetic number, because the mean of its divisors is an integer number (14595518).

Almost surely, 2^87409911 is an apocalyptic number.

87409911 is a deficient number, since it is larger than the sum of its proper divisors (29354233).

87409911 is a wasteful number, since it uses less digits than its factorization.

87409911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54401.

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 87409911 is about 9349.3267672063. The cubic root of 87409911 is about 443.7995859156.

The spelling of 87409911 in words is "eighty-seven million, four hundred nine thousand, nine hundred eleven".