91295993 has 4 divisors (see below), whose sum is σ = 95265408. Its totient is φ = 87326580.

The previous prime is 91295987. The next prime is 91295999. The reversal of 91295993 is 39959219.

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 an interprime number because it is at equal distance from previous prime (91295987) and next prime (91295999).

It is a cyclic number.

It is not a de Polignac number, because 91295993 - 2¹⁴ = 91279609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91295999) 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 3 ways as a sum of consecutive naturals, for example, 1984673 + ... + 1984718.

It is an arithmetic number, because the mean of its divisors is an integer number (23816352).

Almost surely, 2^91295993 is an apocalyptic number.

It is an amenable number.

91295993 is a deficient number, since it is larger than the sum of its proper divisors (3969415).

91295993 is a wasteful number, since it uses less digits than its factorization.

91295993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3969414.

The product of its digits is 196830, while the sum is 47.

The square root of 91295993 is about 9554.8936676449. The cubic root of 91295993 is about 450.2812940858.

The spelling of 91295993 in words is "ninety-one million, two hundred ninety-five thousand, nine hundred ninety-three".