36123891 has 8 divisors (see below), whose sum is σ = 48278160. Its totient is φ = 24026112.

The previous prime is 36123889. The next prime is 36123907. The reversal of 36123891 is 19832163.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 36123891 - 2¹ = 36123889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (36123391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12606 + ... + 15203.

It is an arithmetic number, because the mean of its divisors is an integer number (6034770).

Almost surely, 2^36123891 is an apocalyptic number.

36123891 is a deficient number, since it is larger than the sum of its proper divisors (12154269).

36123891 is a wasteful number, since it uses less digits than its factorization.

36123891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28245.

The product of its digits is 7776, while the sum is 33.

The square root of 36123891 is about 6010.3153827399. The cubic root of 36123891 is about 330.5710681241.

It can be divided in two parts, 3612 and 3891, that added together give a triangular number (7503 = T₁₂₂).

The spelling of 36123891 in words is "thirty-six million, one hundred twenty-three thousand, eight hundred ninety-one".