91685002069 has 4 divisors (see below), whose sum is σ = 91696587840. Its totient is φ = 91673416300.

The previous prime is 91685002049. The next prime is 91685002121. The reversal of 91685002069 is 96020058619.

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 an emirpimes, since its reverse is a distinct semiprime: 96020058619 = 1399 ⋅68634781.

It is a cyclic number.

It is not a de Polignac number, because 91685002069 - 2¹⁵ = 91684969301 is a prime.

It is a super-2 number, since 2×91685002069² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91685002039) 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, 5781007 + ... + 5796844.

It is an arithmetic number, because the mean of its divisors is an integer number (22924146960).

Almost surely, 2^91685002069 is an apocalyptic number.

It is an amenable number.

91685002069 is a deficient number, since it is larger than the sum of its proper divisors (11585771).

91685002069 is a wasteful number, since it uses less digits than its factorization.

91685002069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11585770.

The product of its (nonzero) digits is 233280, while the sum is 46.

The spelling of 91685002069 in words is "ninety-one billion, six hundred eighty-five million, two thousand, sixty-nine".