36006991 has 4 divisors (see below), whose sum is σ = 36033552. Its totient is φ = 35980432.

The previous prime is 36006973. The next prime is 36007001. The reversal of 36006991 is 19960063.

36006991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19960063 = 31 ⋅643873.

It is a cyclic number.

It is not a de Polignac number, because 36006991 - 2⁵ = 36006959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36006911) 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, 11131 + ... + 13996.

It is an arithmetic number, because the mean of its divisors is an integer number (9008388).

Almost surely, 2^36006991 is an apocalyptic number.

36006991 is a deficient number, since it is larger than the sum of its proper divisors (26561).

36006991 is a wasteful number, since it uses less digits than its factorization.

36006991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26560.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 36006991 is about 6000.5825550525. The cubic root of 36006991 is about 330.2140973703.

The spelling of 36006991 in words is "thirty-six million, six thousand, nine hundred ninety-one".