91423454 has 4 divisors (see below), whose sum is σ = 137135184. Its totient is φ = 45711726.

The previous prime is 91423439. The next prime is 91423469. The reversal of 91423454 is 45432419.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45432419 = 59 ⋅770041.

It is an interprime number because it is at equal distance from previous prime (91423439) and next prime (91423469).

It is a self number, because there is not a number n which added to its sum of digits gives 91423454.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22855862 + ... + 22855865.

It is an arithmetic number, because the mean of its divisors is an integer number (34283796).

Almost surely, 2^91423454 is an apocalyptic number.

91423454 is a deficient number, since it is larger than the sum of its proper divisors (45711730).

91423454 is a wasteful number, since it uses less digits than its factorization.

91423454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45711729.

The product of its digits is 17280, while the sum is 32.

The square root of 91423454 is about 9561.5612741853. The cubic root of 91423454 is about 450.4907469265.

The spelling of 91423454 in words is "ninety-one million, four hundred twenty-three thousand, four hundred fifty-four".