87308819 has 16 divisors (see below), whose sum is σ = 99724800. Its totient is φ = 75771936.

The previous prime is 87308813. The next prime is 87308833. The reversal of 87308819 is 91880378.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87308819 is a prime.

It is a super-2 number, since 2×87308819² = 15245659750349522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87308819.

It is not an unprimeable number, because it can be changed into a prime (87308813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33062 + ... + 35604.

It is an arithmetic number, because the mean of its divisors is an integer number (6232800).

Almost surely, 2^87308819 is an apocalyptic number.

87308819 is a deficient number, since it is larger than the sum of its proper divisors (12415981).

87308819 is a wasteful number, since it uses less digits than its factorization.

87308819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2714.

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 87308819 is about 9343.9188245618. The cubic root of 87308819 is about 443.6284310505.

The spelling of 87308819 in words is "eighty-seven million, three hundred eight thousand, eight hundred nineteen".