91479335193 has 6 divisors (see below), whose sum is σ = 132136817514. Its totient is φ = 60986223456.

The previous prime is 91479335153. The next prime is 91479335201. The reversal of 91479335193 is 39153397419.

It is a happy number.

91479335193 is a `hidden beast` number, since 9 + 1 + 479 + 33 + 51 + 93 = 666.

It can be written as a sum of positive squares in only one way, i.e., 46211241024 + 45268094169 = 214968^2 + 212763^2 .

It is not a de Polignac number, because 91479335193 - 2⁸ = 91479334937 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (91479335153) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5082185280 + ... + 5082185297.

It is an arithmetic number, because the mean of its divisors is an integer number (22022802919).

Almost surely, 2^91479335193 is an apocalyptic number.

It is an amenable number.

91479335193 is a deficient number, since it is larger than the sum of its proper divisors (40657482321).

91479335193 is a wasteful number, since it uses less digits than its factorization.

91479335193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10164370583 (or 10164370580 counting only the distinct ones).

The product of its digits is 2755620, while the sum is 54.

The spelling of 91479335193 in words is "ninety-one billion, four hundred seventy-nine million, three hundred thirty-five thousand, one hundred ninety-three".