87506897 has 4 divisors (see below), whose sum is σ = 87586356. Its totient is φ = 87427440.

The previous prime is 87506851. The next prime is 87506917. The reversal of 87506897 is 79860578.

It is a happy number.

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 31091776 + 56415121 = 5576^2 + 7511^2 .

It is a cyclic number.

It is not a de Polignac number, because 87506897 - 2²⁰ = 86458321 is a prime.

It is a super-5 number, since 5×87506897⁵ (a number of 41 digits) contains 55555 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87506197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38054 + ... + 40287.

It is an arithmetic number, because the mean of its divisors is an integer number (21896589).

Almost surely, 2^87506897 is an apocalyptic number.

It is an amenable number.

87506897 is a deficient number, since it is larger than the sum of its proper divisors (79459).

87506897 is a wasteful number, since it uses less digits than its factorization.

87506897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79458.

The product of its (nonzero) digits is 846720, while the sum is 50.

The square root of 87506897 is about 9354.5121198275. The cubic root of 87506897 is about 443.9636650866.

The spelling of 87506897 in words is "eighty-seven million, five hundred six thousand, eight hundred ninety-seven".