87235537237 has 4 divisors (see below), whose sum is σ = 87533269740. Its totient is φ = 86937804736.

The previous prime is 87235537229. The next prime is 87235537289. The reversal of 87235537237 is 73273553278.

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 76570637796 + 10664899441 = 276714^2 + 103271^2 .

It is a cyclic number.

It is not a de Polignac number, because 87235537237 - 2³ = 87235537229 is a prime.

It is a super-2 number, since 2×87235537237² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87235537297) 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, 148865812 + ... + 148866397.

It is an arithmetic number, because the mean of its divisors is an integer number (21883317435).

Almost surely, 2^87235537237 is an apocalyptic number.

It is an amenable number.

87235537237 is a deficient number, since it is larger than the sum of its proper divisors (297732503).

87235537237 is a wasteful number, since it uses less digits than its factorization.

87235537237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297732502.

The product of its digits is 7408800, while the sum is 52.

The spelling of 87235537237 in words is "eighty-seven billion, two hundred thirty-five million, five hundred thirty-seven thousand, two hundred thirty-seven".