87755443 has 4 divisors (see below), whose sum is σ = 87876880. Its totient is φ = 87634008.

The previous prime is 87755407. The next prime is 87755467. The reversal of 87755443 is 34455778.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87755443 is a prime.

It is a super-2 number, since 2×87755443² = 15402035552252498, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 87755443.

It is not an unprimeable number, because it can be changed into a prime (87755483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59628 + ... + 61081.

It is an arithmetic number, because the mean of its divisors is an integer number (21969220).

Almost surely, 2^87755443 is an apocalyptic number.

87755443 is a deficient number, since it is larger than the sum of its proper divisors (121437).

87755443 is a wasteful number, since it uses less digits than its factorization.

87755443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121436.

The product of its digits is 470400, while the sum is 43.

The square root of 87755443 is about 9367.7875189396. The cubic root of 87755443 is about 444.3835980290.

The spelling of 87755443 in words is "eighty-seven million, seven hundred fifty-five thousand, four hundred forty-three".