87890105 has 8 divisors (see below), whose sum is σ = 111019200. Its totient is φ = 66611376.

The previous prime is 87890069. The next prime is 87890113. The reversal of 87890105 is 50109878.

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 87890105 - 2⁶ = 87890041 is a prime.

It is a super-2 number, since 2×87890105² = 15449341113822050, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 462485 + ... + 462674.

It is an arithmetic number, because the mean of its divisors is an integer number (13877400).

Almost surely, 2^87890105 is an apocalyptic number.

It is an amenable number.

87890105 is a deficient number, since it is larger than the sum of its proper divisors (23129095).

87890105 is a wasteful number, since it uses less digits than its factorization.

87890105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925183.

The product of its (nonzero) digits is 20160, while the sum is 38.

The square root of 87890105 is about 9374.9722666256. The cubic root of 87890105 is about 444.6107862195.

The spelling of 87890105 in words is "eighty-seven million, eight hundred ninety thousand, one hundred five".