87850817 has 2 divisors, whose sum is σ = 87850818. Its totient is φ = 87850816.

The previous prime is 87850801. The next prime is 87850843. The reversal of 87850817 is 71805878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86787856 + 1062961 = 9316^2 + 1031^2 .

It is a cyclic number.

It is not a de Polignac number, because 87850817 - 2⁴ = 87850801 is a prime.

It is not a weakly prime, because it can be changed into another prime (87850117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43925408 + 43925409.

It is an arithmetic number, because the mean of its divisors is an integer number (43925409).

Almost surely, 2^87850817 is an apocalyptic number.

It is an amenable number.

87850817 is a deficient number, since it is larger than the sum of its proper divisors (1).

87850817 is an equidigital number, since it uses as much as digits as its factorization.

87850817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 125440, while the sum is 44.

The square root of 87850817 is about 9372.8766662109. The cubic root of 87850817 is about 444.5445274447.

The spelling of 87850817 in words is "eighty-seven million, eight hundred fifty thousand, eight hundred seventeen".