91448398 has 4 divisors (see below), whose sum is σ = 137172600. Its totient is φ = 45724198.

The previous prime is 91448393. The next prime is 91448411. The reversal of 91448398 is 89384419.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89384419 = 17 ⋅5257907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91448393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22862098 + ... + 22862101.

It is an arithmetic number, because the mean of its divisors is an integer number (34293150).

Almost surely, 2^91448398 is an apocalyptic number.

91448398 is a deficient number, since it is larger than the sum of its proper divisors (45724202).

91448398 is a wasteful number, since it uses less digits than its factorization.

91448398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45724201.

The product of its digits is 248832, while the sum is 46.

The square root of 91448398 is about 9562.8655747114. The cubic root of 91448398 is about 450.5317138735.

The spelling of 91448398 in words is "ninety-one million, four hundred forty-eight thousand, three hundred ninety-eight".