987818401 has 2 divisors, whose sum is σ = 987818402. Its totient is φ = 987818400.

The previous prime is 987818389. The next prime is 987818413. The reversal of 987818401 is 104818789.

987818401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (987818389) and next prime (987818413).

It can be written as a sum of positive squares in only one way, i.e., 986022801 + 1795600 = 31401^2 + 1340^2 .

It is a cyclic number.

It is not a de Polignac number, because 987818401 - 2⁵ = 987818369 is a prime.

It is not a weakly prime, because it can be changed into another prime (987818471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493909200 + 493909201.

It is an arithmetic number, because the mean of its divisors is an integer number (493909201).

Almost surely, 2^987818401 is an apocalyptic number.

It is an amenable number.

987818401 is a deficient number, since it is larger than the sum of its proper divisors (1).

987818401 is an equidigital number, since it uses as much as digits as its factorization.

987818401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129024, while the sum is 46.

The square root of 987818401 is about 31429.5784413345. The cubic root of 987818401 is about 995.9228665744.

The spelling of 987818401 in words is "nine hundred eighty-seven million, eight hundred eighteen thousand, four hundred one".