87255809 has 8 divisors (see below), whose sum is σ = 95016000. Its totient is φ = 79812432.

The previous prime is 87255797. The next prime is 87255811. The reversal of 87255809 is 90855278.

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 87255809 - 2¹⁶ = 87190273 is a prime.

It is a super-2 number, since 2×87255809² = 15227152408488962, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 87255809.

It is not an unprimeable number, because it can be changed into a prime (87255109) 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, 78629 + ... + 79730.

It is an arithmetic number, because the mean of its divisors is an integer number (11877000).

Almost surely, 2^87255809 is an apocalyptic number.

It is an amenable number.

87255809 is a deficient number, since it is larger than the sum of its proper divisors (7760191).

87255809 is a wasteful number, since it uses less digits than its factorization.

87255809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158407.

The product of its (nonzero) digits is 201600, while the sum is 44.

The square root of 87255809 is about 9341.0817896002. The cubic root of 87255809 is about 443.5386291098.

The spelling of 87255809 in words is "eighty-seven million, two hundred fifty-five thousand, eight hundred nine".