87472417 has 2 divisors, whose sum is σ = 87472418. Its totient is φ = 87472416.

The previous prime is 87472379. The next prime is 87472423. The reversal of 87472417 is 71427478.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76020961 + 11451456 = 8719^2 + 3384^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87472417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87472417.

It is not a weakly prime, because it can be changed into another prime (87472487) 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, 43736208 + 43736209.

It is an arithmetic number, because the mean of its divisors is an integer number (43736209).

Almost surely, 2^87472417 is an apocalyptic number.

It is an amenable number.

87472417 is a deficient number, since it is larger than the sum of its proper divisors (1).

87472417 is an equidigital number, since it uses as much as digits as its factorization.

87472417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87808, while the sum is 40.

The square root of 87472417 is about 9352.6689773561. The cubic root of 87472417 is about 443.9053463380.

The spelling of 87472417 in words is "eighty-seven million, four hundred seventy-two thousand, four hundred seventeen".