87292475209 has 9 divisors (see below), whose sum is σ = 89382752109. Its totient is φ = 85250008620.

The previous prime is 87292475203. The next prime is 87292475213. The reversal of 87292475209 is 90257429278.

The square root of 87292475209 is 295453.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 87292475209 - 2²⁷ = 87158257481 is a prime.

It is a super-2 number, since 2×87292475209² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87292475209.

It is not an unprimeable number, because it can be changed into a prime (87292475203) 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 8 ways as a sum of consecutive naturals, for example, 12701044 + ... + 12707914.

It is an arithmetic number, because the mean of its divisors is an integer number (9931416901).

Almost surely, 2^87292475209 is an apocalyptic number.

87292475209 is the 295453-rd square number.

87292475209 is the 147727-th centered octagonal number.

It is an amenable number.

87292475209 is a deficient number, since it is larger than the sum of its proper divisors (2090276900).

87292475209 is an frugal number, since it uses more digits than its factorization.

87292475209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13828 (or 6914 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 87292475209 in words is "eighty-seven billion, two hundred ninety-two million, four hundred seventy-five thousand, two hundred nine".