87393443 has 4 divisors (see below), whose sum is σ = 90407040. Its totient is φ = 84379848.

The previous prime is 87393389. The next prime is 87393463. The reversal of 87393443 is 34439378.

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

It is a cyclic number.

It is not a de Polignac number, because 87393443 - 2¹² = 87389347 is a prime.

It is a super-2 number, since 2×87393443² = 15275227758788498, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87393443.

It is not an unprimeable number, because it can be changed into a prime (87393463) 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, 1506755 + ... + 1506812.

It is an arithmetic number, because the mean of its divisors is an integer number (22601760).

Almost surely, 2^87393443 is an apocalyptic number.

87393443 is a deficient number, since it is larger than the sum of its proper divisors (3013597).

87393443 is a wasteful number, since it uses less digits than its factorization.

87393443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3013596.

The product of its digits is 217728, while the sum is 41.

The square root of 87393443 is about 9348.4460205962. The cubic root of 87393443 is about 443.7717135973.

The spelling of 87393443 in words is "eighty-seven million, three hundred ninety-three thousand, four hundred forty-three".