91006546 has 4 divisors (see below), whose sum is σ = 136509822. Its totient is φ = 45503272.

The previous prime is 91006543. The next prime is 91006567. The reversal of 91006546 is 64560019.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64560019 = 2273 ⋅28403.

It can be written as a sum of positive squares in only one way, i.e., 76650025 + 14356521 = 8755^2 + 3789^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (91006541) 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, 22751635 + ... + 22751638.

Almost surely, 2^91006546 is an apocalyptic number.

91006546 is a deficient number, since it is larger than the sum of its proper divisors (45503276).

91006546 is a wasteful number, since it uses less digits than its factorization.

91006546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45503275.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 91006546 is about 9539.7351116265. The cubic root of 91006546 is about 449.8049294428.

The spelling of 91006546 in words is "ninety-one million, six thousand, five hundred forty-six".