91861036 has 12 divisors (see below), whose sum is σ = 161164528. Its totient is φ = 45814032.

The previous prime is 91861027. The next prime is 91861039. The reversal of 91861036 is 63016819.

It is a junction number, because it is equal to n+sod(n) for n = 91860992 and 91861010.

It is not an unprimeable number, because it can be changed into a prime (91861039) 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 in 3 ways as a sum of consecutive naturals, for example, 27336 + ... + 30511.

Almost surely, 2^91861036 is an apocalyptic number.

It is an amenable number.

91861036 is a deficient number, since it is larger than the sum of its proper divisors (69303492).

91861036 is a wasteful number, since it uses less digits than its factorization.

91861036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58248 (or 58246 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 91861036 is about 9584.4163098229. The cubic root of 91861036 is about 451.2083343845.

The spelling of 91861036 in words is "ninety-one million, eight hundred sixty-one thousand, thirty-six".