87459905 has 8 divisors (see below), whose sum is σ = 113025192. Its totient is φ = 64585728.

The previous prime is 87459901. The next prime is 87459919. The reversal of 87459905 is 50995478.

It is a Cunningham number, because it is equal to 9352²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 12931216 + 74528689 = 3596^2 + 8633^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 87459905 - 2² = 87459901 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 87459905.

It is not an unprimeable number, because it can be changed into a prime (87459901) 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, 672704 + ... + 672833.

It is an arithmetic number, because the mean of its divisors is an integer number (14128149).

Almost surely, 2^87459905 is an apocalyptic number.

It is an amenable number.

87459905 is a deficient number, since it is larger than the sum of its proper divisors (25565287).

87459905 is a wasteful number, since it uses less digits than its factorization.

87459905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345555.

The product of its (nonzero) digits is 453600, while the sum is 47.

The square root of 87459905 is about 9352.0000534645. Note that the first 4 decimals coincide. The cubic root of 87459905 is about 443.8841800140.

The spelling of 87459905 in words is "eighty-seven million, four hundred fifty-nine thousand, nine hundred five".