91651382 has 4 divisors (see below), whose sum is σ = 137477076. Its totient is φ = 45825690.

The previous prime is 91651379. The next prime is 91651411. The reversal of 91651382 is 28315619.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28315619 = 37 ⋅765287.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 22912844 + ... + 22912847.

It is an arithmetic number, because the mean of its divisors is an integer number (34369269).

Almost surely, 2^91651382 is an apocalyptic number.

91651382 is a deficient number, since it is larger than the sum of its proper divisors (45825694).

91651382 is a wasteful number, since it uses less digits than its factorization.

91651382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45825693.

The product of its digits is 12960, while the sum is 35.

The square root of 91651382 is about 9573.4728286030. The cubic root of 91651382 is about 450.8648093739.

The spelling of 91651382 in words is "ninety-one million, six hundred fifty-one thousand, three hundred eighty-two".