87042403 has 4 divisors (see below), whose sum is σ = 99477040. Its totient is φ = 74607768.

The previous prime is 87042391. The next prime is 87042407. The reversal of 87042403 is 30424078.

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 87042403 - 2⁹ = 87041891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87042407) 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, 6217308 + ... + 6217321.

It is an arithmetic number, because the mean of its divisors is an integer number (24869260).

Almost surely, 2^87042403 is an apocalyptic number.

87042403 is a deficient number, since it is larger than the sum of its proper divisors (12434637).

87042403 is a wasteful number, since it uses less digits than its factorization.

87042403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12434636.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 87042403 is about 9329.6518155824. The cubic root of 87042403 is about 443.1767388726.

The spelling of 87042403 in words is "eighty-seven million, forty-two thousand, four hundred three".