91309793 has 8 divisors (see below), whose sum is σ = 95379648. Its totient is φ = 87248304.

The previous prime is 91309783. The next prime is 91309819. The reversal of 91309793 is 39790319.

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 91309793 - 2¹⁴ = 91293409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 91309793.

It is not an unprimeable number, because it can be changed into a prime (91309723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32771 + ... + 35447.

It is an arithmetic number, because the mean of its divisors is an integer number (11922456).

Almost surely, 2^91309793 is an apocalyptic number.

It is an amenable number.

91309793 is a deficient number, since it is larger than the sum of its proper divisors (4069855).

91309793 is a wasteful number, since it uses less digits than its factorization.

91309793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4183.

The product of its (nonzero) digits is 45927, while the sum is 41.

The square root of 91309793 is about 9555.6157834019. The cubic root of 91309793 is about 450.3039806193.

The spelling of 91309793 in words is "ninety-one million, three hundred nine thousand, seven hundred ninety-three".