87888401 has 2 divisors, whose sum is σ = 87888402. Its totient is φ = 87888400.

The previous prime is 87888391. The next prime is 87888439. The reversal of 87888401 is 10488878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84916225 + 2972176 = 9215^2 + 1724^2 .

It is a cyclic number.

It is not a de Polignac number, because 87888401 - 2⁶ = 87888337 is a prime.

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 (87888481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43944200 + 43944201.

It is an arithmetic number, because the mean of its divisors is an integer number (43944201).

Almost surely, 2^87888401 is an apocalyptic number.

It is an amenable number.

87888401 is a deficient number, since it is larger than the sum of its proper divisors (1).

87888401 is an equidigital number, since it uses as much as digits as its factorization.

87888401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 114688, while the sum is 44.

The square root of 87888401 is about 9374.8813859163. The cubic root of 87888401 is about 444.6079128521.

The spelling of 87888401 in words is "eighty-seven million, eight hundred eighty-eight thousand, four hundred one".