87503081 has 4 divisors (see below), whose sum is σ = 88090500. Its totient is φ = 86915664.

The previous prime is 87503071. The next prime is 87503083. The reversal of 87503081 is 18030578.

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

It can be written as a sum of positive squares in 2 ways, for example, as 34810000 + 52693081 = 5900^2 + 7259^2 .

It is a cyclic number.

It is not a de Polignac number, because 87503081 - 2²² = 83308777 is a prime.

It is a super-2 number, since 2×87503081² = 15313578368985122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87503083) 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, 293486 + ... + 293783.

It is an arithmetic number, because the mean of its divisors is an integer number (22022625).

Almost surely, 2^87503081 is an apocalyptic number.

It is an amenable number.

87503081 is a deficient number, since it is larger than the sum of its proper divisors (587419).

87503081 is a wasteful number, since it uses less digits than its factorization.

87503081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587418.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 87503081 is about 9354.3081518624. The cubic root of 87503081 is about 443.9572115382.

The spelling of 87503081 in words is "eighty-seven million, five hundred three thousand, eighty-one".