87572069 has 8 divisors (see below), whose sum is σ = 94556280. Its totient is φ = 80623296.

The previous prime is 87572047. The next prime is 87572071. The reversal of 87572069 is 96027578.

It can be written as a sum of positive squares in 4 ways, for example, as 5452225 + 82119844 = 2335^2 + 9062^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87572069 - 2²⁴ = 70794853 is a prime.

It is a super-2 number, since 2×87572069² = 15337734537881522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87572029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3602 + ... + 13715.

It is an arithmetic number, because the mean of its divisors is an integer number (11819535).

Almost surely, 2^87572069 is an apocalyptic number.

It is an amenable number.

87572069 is a deficient number, since it is larger than the sum of its proper divisors (6984211).

87572069 is a wasteful number, since it uses less digits than its factorization.

87572069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17719.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 87572069 is about 9357.9949241277. The cubic root of 87572069 is about 444.0738538105.

The spelling of 87572069 in words is "eighty-seven million, five hundred seventy-two thousand, sixty-nine".