91073133 has 32 divisors (see below), whose sum is σ = 141972480. Its totient is φ = 57620160.

The previous prime is 91073119. The next prime is 91073159. The reversal of 91073133 is 33137019.

It is not a de Polignac number, because 91073133 - 2¹⁸ = 90810989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 91073097 and 91073106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91073113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43335 + ... + 45387.

It is an arithmetic number, because the mean of its divisors is an integer number (4436640).

Almost surely, 2^91073133 is an apocalyptic number.

91073133 is a gapful number since it is divisible by the number (93) formed by its first and last digit.

It is an amenable number.

91073133 is a deficient number, since it is larger than the sum of its proper divisors (50899347).

91073133 is a wasteful number, since it uses less digits than its factorization.

91073133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146 (or 2140 counting only the distinct ones).

The product of its (nonzero) digits is 1701, while the sum is 27.

The square root of 91073133 is about 9543.2244550781. The cubic root of 91073133 is about 449.9146060185.

The spelling of 91073133 in words is "ninety-one million, seventy-three thousand, one hundred thirty-three".