91233457 has 4 divisors (see below), whose sum is σ = 104266816. Its totient is φ = 78200100.

The previous prime is 91233451. The next prime is 91233463. The reversal of 91233457 is 75433219.

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 (91233451) and next prime (91233463).

It is a cyclic number.

It is not a de Polignac number, because 91233457 - 2¹⁹ = 90709169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91233451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6516669 + ... + 6516682.

It is an arithmetic number, because the mean of its divisors is an integer number (26066704).

Almost surely, 2^91233457 is an apocalyptic number.

It is an amenable number.

91233457 is a deficient number, since it is larger than the sum of its proper divisors (13033359).

91233457 is a wasteful number, since it uses less digits than its factorization.

91233457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13033358.

The product of its digits is 22680, while the sum is 34.

The square root of 91233457 is about 9551.6206478273. The cubic root of 91233457 is about 450.1784592591.

The spelling of 91233457 in words is "ninety-one million, two hundred thirty-three thousand, four hundred fifty-seven".