87811742 has 4 divisors (see below), whose sum is σ = 131717616. Its totient is φ = 43905870.

The previous prime is 87811733. The next prime is 87811751. The reversal of 87811742 is 24711878.

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

It is an interprime number because it is at equal distance from previous prime (87811733) and next prime (87811751).

It is a junction number, because it is equal to n+sod(n) for n = 87811696 and 87811705.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21952934 + ... + 21952937.

It is an arithmetic number, because the mean of its divisors is an integer number (32929404).

Almost surely, 2^87811742 is an apocalyptic number.

87811742 is a deficient number, since it is larger than the sum of its proper divisors (43905874).

87811742 is a wasteful number, since it uses less digits than its factorization.

87811742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43905873.

The product of its digits is 25088, while the sum is 38.

The square root of 87811742 is about 9370.7919622623. The cubic root of 87811742 is about 444.4786082951.

The spelling of 87811742 in words is "eighty-seven million, eight hundred eleven thousand, seven hundred forty-two".