87238849 has 4 divisors (see below), whose sum is σ = 92370564. Its totient is φ = 82107136.

The previous prime is 87238843. The next prime is 87238871. The reversal of 87238849 is 94883278.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 68359824 + 18879025 = 8268^2 + 4345^2 .

It is a cyclic number.

It is not a de Polignac number, because 87238849 - 2¹¹ = 87236801 is a prime.

It is a super-2 number, since 2×87238849² = 15221233549689602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87238843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2565832 + ... + 2565865.

It is an arithmetic number, because the mean of its divisors is an integer number (23092641).

Almost surely, 2^87238849 is an apocalyptic number.

It is an amenable number.

87238849 is a deficient number, since it is larger than the sum of its proper divisors (5131715).

87238849 is a wasteful number, since it uses less digits than its factorization.

87238849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5131714.

The product of its digits is 774144, while the sum is 49.

The square root of 87238849 is about 9340.1739277168. The cubic root of 87238849 is about 443.5098902301.

The spelling of 87238849 in words is "eighty-seven million, two hundred thirty-eight thousand, eight hundred forty-nine".