87428503 has 4 divisors (see below), whose sum is σ = 89461768. Its totient is φ = 85395240.

The previous prime is 87428459. The next prime is 87428513. The reversal of 87428503 is 30582478.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30582478 = 2 ⋅15291239.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87428503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87428513) 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, 1016568 + ... + 1016653.

It is an arithmetic number, because the mean of its divisors is an integer number (22365442).

Almost surely, 2^87428503 is an apocalyptic number.

87428503 is a deficient number, since it is larger than the sum of its proper divisors (2033265).

87428503 is a wasteful number, since it uses less digits than its factorization.

87428503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2033264.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 87428503 is about 9350.3210105322. The cubic root of 87428503 is about 443.8310489266.

The spelling of 87428503 in words is "eighty-seven million, four hundred twenty-eight thousand, five hundred three".