91874610921 has 8 divisors (see below), whose sum is σ = 122509266880. Its totient is φ = 61244847792.

The previous prime is 91874610901. The next prime is 91874610953. The reversal of 91874610921 is 12901647819.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91874610921 - 2³⁰ = 90800869097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91874610901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1179166 + ... + 1254663.

It is an arithmetic number, because the mean of its divisors is an integer number (15313658360).

Almost surely, 2^91874610921 is an apocalyptic number.

It is an amenable number.

91874610921 is a deficient number, since it is larger than the sum of its proper divisors (30634655959).

91874610921 is a wasteful number, since it uses less digits than its factorization.

91874610921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2446415.

The product of its (nonzero) digits is 217728, while the sum is 48.

The spelling of 91874610921 in words is "ninety-one billion, eight hundred seventy-four million, six hundred ten thousand, nine hundred twenty-one".