91020682 has 4 divisors (see below), whose sum is σ = 136531026. Its totient is φ = 45510340.

The previous prime is 91020661. The next prime is 91020689. The reversal of 91020682 is 28602019.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28602019 = 89 ⋅321371.

It can be written as a sum of positive squares in only one way, i.e., 81342361 + 9678321 = 9019^2 + 3111^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 91020682.

It is not an unprimeable number, because it can be changed into a prime (91020689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22755169 + ... + 22755172.

Almost surely, 2^91020682 is an apocalyptic number.

91020682 is a deficient number, since it is larger than the sum of its proper divisors (45510344).

91020682 is a wasteful number, since it uses less digits than its factorization.

91020682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45510343.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 91020682 is about 9540.4759839329. The cubic root of 91020682 is about 449.8282175599.

The spelling of 91020682 in words is "ninety-one million, twenty thousand, six hundred eighty-two".