91147920133 has 8 divisors (see below), whose sum is σ = 92443104576. Its totient is φ = 89853052800.

The previous prime is 91147920131. The next prime is 91147920161. The reversal of 91147920133 is 33102974119.

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 91147920133 - 2¹ = 91147920131 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 (91147920131) 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, 533013 + ... + 682933.

It is an arithmetic number, because the mean of its divisors is an integer number (11555388072).

Almost surely, 2^91147920133 is an apocalyptic number.

It is an amenable number.

91147920133 is a deficient number, since it is larger than the sum of its proper divisors (1295184443).

91147920133 is a wasteful number, since it uses less digits than its factorization.

91147920133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158555.

The product of its (nonzero) digits is 40824, while the sum is 40.

The spelling of 91147920133 in words is "ninety-one billion, one hundred forty-seven million, nine hundred twenty thousand, one hundred thirty-three".