87974317 has 2 divisors, whose sum is σ = 87974318. Its totient is φ = 87974316.

The previous prime is 87974291. The next prime is 87974323. The reversal of 87974317 is 71347978.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85766121 + 2208196 = 9261^2 + 1486^2 .

It is a cyclic number.

It is not a de Polignac number, because 87974317 - 2¹⁹ = 87450029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87974347) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43987158 + 43987159.

It is an arithmetic number, because the mean of its divisors is an integer number (43987159).

Almost surely, 2^87974317 is an apocalyptic number.

It is an amenable number.

87974317 is a deficient number, since it is larger than the sum of its proper divisors (1).

87974317 is an equidigital number, since it uses as much as digits as its factorization.

87974317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 296352, while the sum is 46.

The square root of 87974317 is about 9379.4625112530. The cubic root of 87974317 is about 444.7527423273.

The spelling of 87974317 in words is "eighty-seven million, nine hundred seventy-four thousand, three hundred seventeen".