91422536917 has 8 divisors (see below), whose sum is σ = 94610712600. Its totient is φ = 88236739584.

The previous prime is 91422536897. The next prime is 91422536923. The reversal of 91422536917 is 71963522419.

It can be written as a sum of positive squares in 4 ways, for example, as 2212197156 + 89210339761 = 47034^2 + 298681^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91422536917 - 2⁷ = 91422536789 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 (91422536977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 516192 + ... + 670297.

It is an arithmetic number, because the mean of its divisors is an integer number (11826339075).

Almost surely, 2^91422536917 is an apocalyptic number.

It is an amenable number.

91422536917 is a deficient number, since it is larger than the sum of its proper divisors (3188175683).

91422536917 is a wasteful number, since it uses less digits than its factorization.

91422536917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189175.

The product of its digits is 816480, while the sum is 49.

The spelling of 91422536917 in words is "ninety-one billion, four hundred twenty-two million, five hundred thirty-six thousand, nine hundred seventeen".