87680305 has 8 divisors (see below), whose sum is σ = 111405672. Its totient is φ = 66018048.

The previous prime is 87680303. The next prime is 87680321. The reversal of 87680305 is 50308678.

It can be written as a sum of positive squares in 4 ways, for example, as 2745649 + 84934656 = 1657^2 + 9216^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 87680305 - 2¹ = 87680303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87680303) 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, 515682 + ... + 515851.

It is an arithmetic number, because the mean of its divisors is an integer number (13925709).

Almost surely, 2^87680305 is an apocalyptic number.

87680305 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

87680305 is a deficient number, since it is larger than the sum of its proper divisors (23725367).

87680305 is a wasteful number, since it uses less digits than its factorization.

87680305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031555.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 87680305 is about 9363.7762147544. The cubic root of 87680305 is about 444.2567317138.

The spelling of 87680305 in words is "eighty-seven million, six hundred eighty thousand, three hundred five".