87148517 has 2 divisors, whose sum is σ = 87148518. Its totient is φ = 87148516.

The previous prime is 87148513. The next prime is 87148531. The reversal of 87148517 is 71584178.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83740801 + 3407716 = 9151^2 + 1846^2 .

It is a cyclic number.

It is not a de Polignac number, because 87148517 - 2² = 87148513 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 (87148513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43574258 + 43574259.

It is an arithmetic number, because the mean of its divisors is an integer number (43574259).

Almost surely, 2^87148517 is an apocalyptic number.

It is an amenable number.

87148517 is a deficient number, since it is larger than the sum of its proper divisors (1).

87148517 is an equidigital number, since it uses as much as digits as its factorization.

87148517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62720, while the sum is 41.

The square root of 87148517 is about 9335.3370051648. The cubic root of 87148517 is about 443.3567590212.

The spelling of 87148517 in words is "eighty-seven million, one hundred forty-eight thousand, five hundred seventeen".