91327658 has 4 divisors (see below), whose sum is σ = 136991490. Its totient is φ = 45663828.

The previous prime is 91327651. The next prime is 91327679. The reversal of 91327658 is 85672319.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85672319 = 677 ⋅126547.

It can be written as a sum of positive squares in only one way, i.e., 88040689 + 3286969 = 9383^2 + 1813^2 .

It is a super-2 number, since 2×91327658² = 16681482231529928, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91327651) by changing a digit.

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 as a sum of consecutive naturals, namely, 22831913 + ... + 22831916.

Almost surely, 2^91327658 is an apocalyptic number.

91327658 is a deficient number, since it is larger than the sum of its proper divisors (45663832).

91327658 is a wasteful number, since it uses less digits than its factorization.

91327658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45663831.

The product of its digits is 90720, while the sum is 41.

The square root of 91327658 is about 9556.5505283026. The cubic root of 91327658 is about 450.3333464217. Note that the first 4 decimals are identical.

The spelling of 91327658 in words is "ninety-one million, three hundred twenty-seven thousand, six hundred fifty-eight".