91640854 has 8 divisors (see below), whose sum is σ = 138159648. Its totient is φ = 45587640.

The previous prime is 91640837. The next prime is 91640917. The reversal of 91640854 is 45804619.

It is a happy number.

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

It is a super-2 number, since 2×91640854² = 16796092243698632, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115902 + ... + 116689.

It is an arithmetic number, because the mean of its divisors is an integer number (17269956).

Almost surely, 2^91640854 is an apocalyptic number.

91640854 is a deficient number, since it is larger than the sum of its proper divisors (46518794).

91640854 is a wasteful number, since it uses less digits than its factorization.

91640854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232790.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 91640854 is about 9572.9229600995. The cubic root of 91640854 is about 450.8475450898.

The spelling of 91640854 in words is "ninety-one million, six hundred forty thousand, eight hundred fifty-four".