91014887 has 4 divisors (see below), whose sum is σ = 94972080. Its totient is φ = 87057696.

The previous prime is 91014863. The next prime is 91014893. The reversal of 91014887 is 78841019.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78841019 = 17 ⋅4637707.

It is a cyclic number.

It is not a de Polignac number, because 91014887 - 2⁶ = 91014823 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91014887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91014587) 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, 1978562 + ... + 1978607.

It is an arithmetic number, because the mean of its divisors is an integer number (23743020).

Almost surely, 2^91014887 is an apocalyptic number.

91014887 is a deficient number, since it is larger than the sum of its proper divisors (3957193).

91014887 is a wasteful number, since it uses less digits than its factorization.

91014887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3957192.

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 91014887 is about 9540.1722730777. The cubic root of 91014887 is about 449.8186709756.

The spelling of 91014887 in words is "ninety-one million, fourteen thousand, eight hundred eighty-seven".