87238105 has 4 divisors (see below), whose sum is σ = 104685732. Its totient is φ = 69790480.

The previous prime is 87238093. The next prime is 87238111. The reversal of 87238105 is 50183278.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50183278 = 2 ⋅25091639.

It can be written as a sum of positive squares in 2 ways, for example, as 11269449 + 75968656 = 3357^2 + 8716^2 .

It is not a de Polignac number, because 87238105 - 2¹¹ = 87236057 is a prime.

It is a super-2 number, since 2×87238105² = 15220973927982050, which contains 22 as substring.

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8723806 + ... + 8723815.

It is an arithmetic number, because the mean of its divisors is an integer number (26171433).

Almost surely, 2^87238105 is an apocalyptic number.

It is an amenable number.

87238105 is a deficient number, since it is larger than the sum of its proper divisors (17447627).

87238105 is a wasteful number, since it uses less digits than its factorization.

87238105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17447626.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 87238105 is about 9340.1340996797. The cubic root of 87238105 is about 443.5086294299.

The spelling of 87238105 in words is "eighty-seven million, two hundred thirty-eight thousand, one hundred five".