87550817 has 2 divisors, whose sum is σ = 87550818. Its totient is φ = 87550816.

The previous prime is 87550787. The next prime is 87550823. The reversal of 87550817 is 71805578.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62710561 + 24840256 = 7919^2 + 4984^2 .

It is a cyclic number.

It is not a de Polignac number, because 87550817 - 2¹⁰ = 87549793 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87550877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43775408 + 43775409.

It is an arithmetic number, because the mean of its divisors is an integer number (43775409).

Almost surely, 2^87550817 is an apocalyptic number.

It is an amenable number.

87550817 is a deficient number, since it is larger than the sum of its proper divisors (1).

87550817 is an equidigital number, since it uses as much as digits as its factorization.

87550817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78400, while the sum is 41.

The square root of 87550817 is about 9356.8593555744. The cubic root of 87550817 is about 444.0379282725.

It can be divided in two parts, 8 and 7550817, that multiplied together give a triangular number (60406536 = T₁₀₉₉₁).

The spelling of 87550817 in words is "eighty-seven million, five hundred fifty thousand, eight hundred seventeen".