36621891 has 6 divisors (see below), whose sum is σ = 52898300. Its totient is φ = 24414588.

The previous prime is 36621889. The next prime is 36621917. The reversal of 36621891 is 19812663.

36621891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 36621891 - 2¹ = 36621889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36621811) 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 5 ways as a sum of consecutive naturals, for example, 2034541 + ... + 2034558.

Almost surely, 2^36621891 is an apocalyptic number.

36621891 is a deficient number, since it is larger than the sum of its proper divisors (16276409).

36621891 is a wasteful number, since it uses less digits than its factorization.

36621891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4069105 (or 4069102 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 36621891 is about 6051.6023497913. The cubic root of 36621891 is about 332.0832126783.

The spelling of 36621891 in words is "thirty-six million, six hundred twenty-one thousand, eight hundred ninety-one".