87347842 has 4 divisors (see below), whose sum is σ = 131021766. Its totient is φ = 43673920.

The previous prime is 87347837. The next prime is 87347849. The reversal of 87347842 is 24874378.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24874378 = 2 ⋅12437189.

It can be written as a sum of positive squares in only one way, i.e., 61449921 + 25897921 = 7839^2 + 5089^2 .

It is not an unprimeable number, because it can be changed into a prime (87347849) 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 as a sum of consecutive naturals, namely, 21836959 + ... + 21836962.

Almost surely, 2^87347842 is an apocalyptic number.

87347842 is a deficient number, since it is larger than the sum of its proper divisors (43673924).

87347842 is a wasteful number, since it uses less digits than its factorization.

87347842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43673923.

The product of its digits is 301056, while the sum is 43.

The square root of 87347842 is about 9346.0067408493. The cubic root of 87347842 is about 443.6945149961.

The spelling of 87347842 in words is "eighty-seven million, three hundred forty-seven thousand, eight hundred forty-two".