87056862917 has 4 divisors (see below), whose sum is σ = 87090131436. Its totient is φ = 87023594400.

The previous prime is 87056862899. The next prime is 87056862941. The reversal of 87056862917 is 71926865078.

It is a happy number.

It is a Cunningham number, because it is equal to 295054²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71926865078 = 2 ⋅35963432539.

It can be written as a sum of positive squares in 2 ways, for example, as 84940770916 + 2116092001 = 291446^2 + 46001^2 .

It is a cyclic number.

It is not a de Polignac number, because 87056862917 - 2¹⁰ = 87056861893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87056862017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16630334 + ... + 16635567.

It is an arithmetic number, because the mean of its divisors is an integer number (21772532859).

Almost surely, 2^87056862917 is an apocalyptic number.

It is an amenable number.

87056862917 is a deficient number, since it is larger than the sum of its proper divisors (33268519).

87056862917 is a wasteful number, since it uses less digits than its factorization.

87056862917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33268518.

The product of its (nonzero) digits is 10160640, while the sum is 59.

The spelling of 87056862917 in words is "eighty-seven billion, fifty-six million, eight hundred sixty-two thousand, nine hundred seventeen".