91842851 has 4 divisors (see below), whose sum is σ = 92093472. Its totient is φ = 91592232.

The previous prime is 91842809. The next prime is 91842889. The reversal of 91842851 is 15824819.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15824819 = 1031 ⋅15349.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91842851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91842451) 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, 124760 + ... + 125493.

It is an arithmetic number, because the mean of its divisors is an integer number (23023368).

Almost surely, 2^91842851 is an apocalyptic number.

91842851 is a deficient number, since it is larger than the sum of its proper divisors (250621).

91842851 is a wasteful number, since it uses less digits than its factorization.

91842851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250620.

The product of its digits is 23040, while the sum is 38.

The square root of 91842851 is about 9583.4675874654. The cubic root of 91842851 is about 451.1785583756.

The spelling of 91842851 in words is "ninety-one million, eight hundred forty-two thousand, eight hundred fifty-one".