91488977 has 4 divisors (see below), whose sum is σ = 91511280. Its totient is φ = 91466676.

The previous prime is 91488973. The next prime is 91488983. The reversal of 91488977 is 77988419.

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, and also an emirpimes, since its reverse is a distinct semiprime: 77988419 = 113 ⋅690163.

It is a cyclic number.

It is not a de Polignac number, because 91488977 - 2² = 91488973 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91488973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3023 + ... + 13860.

It is an arithmetic number, because the mean of its divisors is an integer number (22877820).

Almost surely, 2^91488977 is an apocalyptic number.

It is an amenable number.

91488977 is a deficient number, since it is larger than the sum of its proper divisors (22303).

91488977 is a wasteful number, since it uses less digits than its factorization.

91488977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22302.

The product of its digits is 1016064, while the sum is 53.

The square root of 91488977 is about 9564.9870360602. The cubic root of 91488977 is about 450.5983431542.

The spelling of 91488977 in words is "ninety-one million, four hundred eighty-eight thousand, nine hundred seventy-seven".