87767825 has 6 divisors (see below), whose sum is σ = 108832134. Its totient is φ = 70214240.

The previous prime is 87767809. The next prime is 87767861. The reversal of 87767825 is 52876778.

It can be written as a sum of positive squares in 3 ways, for example, as 1203409 + 86564416 = 1097^2 + 9304^2 .

It is not a de Polignac number, because 87767825 - 2⁴ = 87767809 is a prime.

It is a super-2 number, since 2×87767825² = 15406382210461250, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1755332 + ... + 1755381.

It is an arithmetic number, because the mean of its divisors is an integer number (18138689).

Almost surely, 2^87767825 is an apocalyptic number.

It is an amenable number.

87767825 is a deficient number, since it is larger than the sum of its proper divisors (21064309).

87767825 is a wasteful number, since it uses less digits than its factorization.

87767825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3510723 (or 3510718 counting only the distinct ones).

The product of its digits is 1317120, while the sum is 50.

The square root of 87767825 is about 9368.4483773995. The cubic root of 87767825 is about 444.4044973934.

The spelling of 87767825 in words is "eighty-seven million, seven hundred sixty-seven thousand, eight hundred twenty-five".