87984881 has 2 divisors, whose sum is σ = 87984882. Its totient is φ = 87984880.

The previous prime is 87984863. The next prime is 87984899. The reversal of 87984881 is 18848978.

It is a balanced prime because it is at equal distance from previous prime (87984863) and next prime (87984899).

It can be written as a sum of positive squares in only one way, i.e., 86583025 + 1401856 = 9305^2 + 1184^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87984881 is a prime.

It is a super-2 number, since 2×87984881² = 15482678569168322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (87984181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43992440 + 43992441.

It is an arithmetic number, because the mean of its divisors is an integer number (43992441).

Almost surely, 2^87984881 is an apocalyptic number.

It is an amenable number.

87984881 is a deficient number, since it is larger than the sum of its proper divisors (1).

87984881 is an equidigital number, since it uses as much as digits as its factorization.

87984881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1032192, while the sum is 53.

The square root of 87984881 is about 9380.0256396238. The cubic root of 87984881 is about 444.7705436587.

The spelling of 87984881 in words is "eighty-seven million, nine hundred eighty-four thousand, eight hundred eighty-one".