987072517 has 2 divisors, whose sum is σ = 987072518. Its totient is φ = 987072516.

The previous prime is 987072509. The next prime is 987072523. The reversal of 987072517 is 715270789.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 971319556 + 15752961 = 31166^2 + 3969^2 .

It is a cyclic number.

It is not a de Polignac number, because 987072517 - 2³ = 987072509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (987072017) 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, 493536258 + 493536259.

It is an arithmetic number, because the mean of its divisors is an integer number (493536259).

Almost surely, 2^987072517 is an apocalyptic number.

It is an amenable number.

987072517 is a deficient number, since it is larger than the sum of its proper divisors (1).

987072517 is an equidigital number, since it uses as much as digits as its factorization.

987072517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 246960, while the sum is 46.

The square root of 987072517 is about 31417.7102443829. The cubic root of 987072517 is about 995.6721356107.

The spelling of 987072517 in words is "nine hundred eighty-seven million, seventy-two thousand, five hundred seventeen".