91158393 has 8 divisors (see below), whose sum is σ = 121913056. Its totient is φ = 60588000.

The previous prime is 91158373. The next prime is 91158413. The reversal of 91158393 is 39385119.

It is an interprime number because it is at equal distance from previous prime (91158373) and next prime (91158413).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91158393 - 2⁹ = 91157881 is a prime.

It is a super-2 number, since 2×91158393² = 16619705228684898, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (91158313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44908 + ... + 46893.

It is an arithmetic number, because the mean of its divisors is an integer number (15239132).

Almost surely, 2^91158393 is an apocalyptic number.

It is an amenable number.

91158393 is a deficient number, since it is larger than the sum of its proper divisors (30754663).

91158393 is a wasteful number, since it uses less digits than its factorization.

91158393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92135.

The product of its digits is 29160, while the sum is 39.

The square root of 91158393 is about 9547.6904537171. The cubic root of 91158393 is about 450.0549611882.

The spelling of 91158393 in words is "ninety-one million, one hundred fifty-eight thousand, three hundred ninety-three".