91404073 has 4 divisors (see below), whose sum is σ = 91452240. Its totient is φ = 91355908.

The previous prime is 91404067. The next prime is 91404077. The reversal of 91404073 is 37040419.

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.

It is a cyclic number.

It is not a de Polignac number, because 91404073 - 2⁹ = 91403561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91404077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21115 + ... + 25072.

It is an arithmetic number, because the mean of its divisors is an integer number (22863060).

Almost surely, 2^91404073 is an apocalyptic number.

It is an amenable number.

91404073 is a deficient number, since it is larger than the sum of its proper divisors (48167).

91404073 is a wasteful number, since it uses less digits than its factorization.

91404073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48166.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 91404073 is about 9560.5477353549. The cubic root of 91404073 is about 450.4589112658.

The spelling of 91404073 in words is "ninety-one million, four hundred four thousand, seventy-three".