87005725 has 6 divisors (see below), whose sum is σ = 107887130. Its totient is φ = 69604560.

The previous prime is 87005717. The next prime is 87005729. The reversal of 87005725 is 52750078.

It can be written as a sum of positive squares in 3 ways, for example, as 22781529 + 64224196 = 4773^2 + 8014^2 .

It is not a de Polignac number, because 87005725 - 2³ = 87005717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87005729) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1740090 + ... + 1740139.

Almost surely, 2^87005725 is an apocalyptic number.

It is an amenable number.

87005725 is a deficient number, since it is larger than the sum of its proper divisors (20881405).

87005725 is a wasteful number, since it uses less digits than its factorization.

87005725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3480239 (or 3480234 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 34.

The square root of 87005725 is about 9327.6859402533. The cubic root of 87005725 is about 443.1144813997.

The spelling of 87005725 in words is "eighty-seven million, five thousand, seven hundred twenty-five".