87115933 has 2 divisors, whose sum is σ = 87115934. Its totient is φ = 87115932.

The previous prime is 87115909. The next prime is 87115943. The reversal of 87115933 is 33951178.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58951684 + 28164249 = 7678^2 + 5307^2 .

It is a cyclic number.

It is not a de Polignac number, because 87115933 - 2²¹ = 85018781 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87115892 and 87115901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87115943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43557966 + 43557967.

It is an arithmetic number, because the mean of its divisors is an integer number (43557967).

Almost surely, 2^87115933 is an apocalyptic number.

It is an amenable number.

87115933 is a deficient number, since it is larger than the sum of its proper divisors (1).

87115933 is an equidigital number, since it uses as much as digits as its factorization.

87115933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 37.

The square root of 87115933 is about 9333.5916452350. The cubic root of 87115933 is about 443.3014965109.

The spelling of 87115933 in words is "eighty-seven million, one hundred fifteen thousand, nine hundred thirty-three".