87310393 has 2 divisors, whose sum is σ = 87310394. Its totient is φ = 87310392.

The previous prime is 87310381. The next prime is 87310403. The reversal of 87310393 is 39301378.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56430144 + 30880249 = 7512^2 + 5557^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87310393 is a prime.

It is not a weakly prime, because it can be changed into another prime (87310373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43655196 + 43655197.

It is an arithmetic number, because the mean of its divisors is an integer number (43655197).

Almost surely, 2^87310393 is an apocalyptic number.

It is an amenable number.

87310393 is a deficient number, since it is larger than the sum of its proper divisors (1).

87310393 is an equidigital number, since it uses as much as digits as its factorization.

87310393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 87310393 is about 9344.0030500851. The cubic root of 87310393 is about 443.6310969399.

The spelling of 87310393 in words is "eighty-seven million, three hundred ten thousand, three hundred ninety-three".