87226709917 has 4 divisors (see below), whose sum is σ = 87227335296. Its totient is φ = 87226084540.

The previous prime is 87226709909. The next prime is 87226709923. The reversal of 87226709917 is 71990762278.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 71990762278 = 2 ⋅35995381139.

It is a cyclic number.

It is not a de Polignac number, because 87226709917 - 2³ = 87226709909 is a prime.

It is a super-2 number, since 2×87226709917² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87226701917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2292 + ... + 417682.

It is an arithmetic number, because the mean of its divisors is an integer number (21806833824).

Almost surely, 2^87226709917 is an apocalyptic number.

It is an amenable number.

87226709917 is a deficient number, since it is larger than the sum of its proper divisors (625379).

87226709917 is a wasteful number, since it uses less digits than its factorization.

87226709917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625378.

The product of its (nonzero) digits is 5334336, while the sum is 58.

The spelling of 87226709917 in words is "eighty-seven billion, two hundred twenty-six million, seven hundred nine thousand, nine hundred seventeen".