91014091499 has 4 divisors (see below), whose sum is σ = 94971225936. Its totient is φ = 87056957064.

The previous prime is 91014091489. The next prime is 91014091501. The reversal of 91014091499 is 99419041019.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99419041019 = 41 ⋅2424854659.

It is a cyclic number.

It is not a de Polignac number, because 91014091499 - 2⁸ = 91014091243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91014091429) 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, 1978567184 + ... + 1978567229.

It is an arithmetic number, because the mean of its divisors is an integer number (23742806484).

Almost surely, 2^91014091499 is an apocalyptic number.

91014091499 is a deficient number, since it is larger than the sum of its proper divisors (3957134437).

91014091499 is a wasteful number, since it uses less digits than its factorization.

91014091499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3957134436.

The product of its (nonzero) digits is 104976, while the sum is 47.

The spelling of 91014091499 in words is "ninety-one billion, fourteen million, ninety-one thousand, four hundred ninety-nine".