91438193 has 8 divisors (see below), whose sum is σ = 114000960. Its totient is φ = 71250480.

The previous prime is 91438187. The next prime is 91438199. The reversal of 91438193 is 39183419.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (91438187) and next prime (91438199).

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

It is not a de Polignac number, because 91438193 - 2⁶ = 91438129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91438199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 593678 + ... + 593831.

It is an arithmetic number, because the mean of its divisors is an integer number (14250120).

Almost surely, 2^91438193 is an apocalyptic number.

It is an amenable number.

91438193 is a deficient number, since it is larger than the sum of its proper divisors (22562767).

91438193 is a wasteful number, since it uses less digits than its factorization.

91438193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187527.

The product of its digits is 23328, while the sum is 38.

The square root of 91438193 is about 9562.3319854521. The cubic root of 91438193 is about 450.5149545233.

The spelling of 91438193 in words is "ninety-one million, four hundred thirty-eight thousand, one hundred ninety-three".