91238395 has 4 divisors (see below), whose sum is σ = 109486080. Its totient is φ = 72990712.

The previous prime is 91238359. The next prime is 91238449. The reversal of 91238395 is 59383219.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 59383219 = 7 ⋅8483317.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91238395 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9123835 + ... + 9123844.

It is an arithmetic number, because the mean of its divisors is an integer number (27371520).

Almost surely, 2^91238395 is an apocalyptic number.

91238395 is a deficient number, since it is larger than the sum of its proper divisors (18247685).

91238395 is a wasteful number, since it uses less digits than its factorization.

91238395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18247684.

The product of its digits is 58320, while the sum is 40.

The square root of 91238395 is about 9551.8791344950. The cubic root of 91238395 is about 450.1865810644.

The spelling of 91238395 in words is "ninety-one million, two hundred thirty-eight thousand, three hundred ninety-five".