87494417 has 2 divisors, whose sum is σ = 87494418. Its totient is φ = 87494416.

The previous prime is 87494389. The next prime is 87494423. The reversal of 87494417 is 71449478.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45711121 + 41783296 = 6761^2 + 6464^2 .

It is a cyclic number.

It is not a de Polignac number, because 87494417 - 2⁶ = 87494353 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87494447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43747208 + 43747209.

It is an arithmetic number, because the mean of its divisors is an integer number (43747209).

Almost surely, 2^87494417 is an apocalyptic number.

It is an amenable number.

87494417 is a deficient number, since it is larger than the sum of its proper divisors (1).

87494417 is an equidigital number, since it uses as much as digits as its factorization.

87494417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 44.

The square root of 87494417 is about 9353.8450382717. The cubic root of 87494417 is about 443.9425584456.

The spelling of 87494417 in words is "eighty-seven million, four hundred ninety-four thousand, four hundred seventeen".