91925851 has 4 divisors (see below), whose sum is σ = 97333272. Its totient is φ = 86518432.

The previous prime is 91925831. The next prime is 91925863. The reversal of 91925851 is 15852919.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15852919 = 3061 ⋅5179.

It is a cyclic number.

It is not a de Polignac number, because 91925851 - 2¹⁷ = 91794779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91925831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2703685 + ... + 2703718.

It is an arithmetic number, because the mean of its divisors is an integer number (24333318).

Almost surely, 2^91925851 is an apocalyptic number.

91925851 is a deficient number, since it is larger than the sum of its proper divisors (5407421).

91925851 is a wasteful number, since it uses less digits than its factorization.

91925851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5407420.

The product of its digits is 32400, while the sum is 40.

The square root of 91925851 is about 9587.7969836663. The cubic root of 91925851 is about 451.3144301205.

The spelling of 91925851 in words is "ninety-one million, nine hundred twenty-five thousand, eight hundred fifty-one".