987474197 has 2 divisors, whose sum is σ = 987474198. Its totient is φ = 987474196.

The previous prime is 987474143. The next prime is 987474221. The reversal of 987474197 is 791474789.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 700713841 + 286760356 = 26471^2 + 16934^2 .

It is a cyclic number.

It is not a de Polignac number, because 987474197 - 2⁶ = 987474133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (987474097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493737098 + 493737099.

It is an arithmetic number, because the mean of its divisors is an integer number (493737099).

Almost surely, 2^987474197 is an apocalyptic number.

It is an amenable number.

987474197 is a deficient number, since it is larger than the sum of its proper divisors (1).

987474197 is an equidigital number, since it uses as much as digits as its factorization.

987474197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3556224, while the sum is 56.

The square root of 987474197 is about 31424.1021669673. The cubic root of 987474197 is about 995.8071771394.

The spelling of 987474197 in words is "nine hundred eighty-seven million, four hundred seventy-four thousand, one hundred ninety-seven".