36581091 has 4 divisors (see below), whose sum is σ = 48774792. Its totient is φ = 24387392.

The previous prime is 36581071. The next prime is 36581113. The reversal of 36581091 is 19018563.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 36581091 - 2¹⁰ = 36580067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (36581021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6096846 + ... + 6096851.

It is an arithmetic number, because the mean of its divisors is an integer number (12193698).

Almost surely, 2^36581091 is an apocalyptic number.

36581091 is a deficient number, since it is larger than the sum of its proper divisors (12193701).

36581091 is a wasteful number, since it uses less digits than its factorization.

36581091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12193700.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 36581091 is about 6048.2304023574. The cubic root of 36581091 is about 331.9598435730.

The spelling of 36581091 in words is "thirty-six million, five hundred eighty-one thousand, ninety-one".