36138389 has 4 divisors (see below), whose sum is σ = 41301024. Its totient is φ = 30975756.

The previous prime is 36138383. The next prime is 36138391. The reversal of 36138389 is 98383163.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 36138389 - 2¹⁶ = 36072853 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 (36138383) 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, 2581307 + ... + 2581320.

It is an arithmetic number, because the mean of its divisors is an integer number (10325256).

Almost surely, 2^36138389 is an apocalyptic number.

It is an amenable number.

36138389 is a deficient number, since it is larger than the sum of its proper divisors (5162635).

36138389 is an equidigital number, since it uses as much as digits as its factorization.

36138389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5162634.

The product of its digits is 93312, while the sum is 41.

The square root of 36138389 is about 6011.5213548652. The cubic root of 36138389 is about 330.6152861213.

The spelling of 36138389 in words is "thirty-six million, one hundred thirty-eight thousand, three hundred eighty-nine".