87299285 has 4 divisors (see below), whose sum is σ = 104759148. Its totient is φ = 69839424.

The previous prime is 87299269. The next prime is 87299287. The reversal of 87299285 is 58299278.

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 34562641 + 52736644 = 5879^2 + 7262^2 .

It is a cyclic number.

It is not a de Polignac number, because 87299285 - 2⁴ = 87299269 is a prime.

It is a super-2 number, since 2×87299285² = 15242330323022450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87299287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8729924 + ... + 8729933.

It is an arithmetic number, because the mean of its divisors is an integer number (26189787).

Almost surely, 2^87299285 is an apocalyptic number.

It is an amenable number.

87299285 is a deficient number, since it is larger than the sum of its proper divisors (17459863).

87299285 is a wasteful number, since it uses less digits than its factorization.

87299285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17459862.

The product of its digits is 725760, while the sum is 50.

The square root of 87299285 is about 9343.4086392494. The cubic root of 87299285 is about 443.6122825962.

The spelling of 87299285 in words is "eighty-seven million, two hundred ninety-nine thousand, two hundred eighty-five".