36072391 has 4 divisors (see below), whose sum is σ = 36085384. Its totient is φ = 36059400.

The previous prime is 36072371. The next prime is 36072397. The reversal of 36072391 is 19327063.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 19327063 = 7 ⋅2761009.

It is a cyclic number.

It is not a de Polignac number, because 36072391 - 2²⁵ = 2517959 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 (36072397) 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, 465 + ... + 8506.

It is an arithmetic number, because the mean of its divisors is an integer number (9021346).

Almost surely, 2^36072391 is an apocalyptic number.

36072391 is a deficient number, since it is larger than the sum of its proper divisors (12993).

36072391 is an equidigital number, since it uses as much as digits as its factorization.

36072391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12992.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 36072391 is about 6006.0295537068. The cubic root of 36072391 is about 330.4139006076.

It can be divided in two parts, 36072 and 391, that added together give a palindrome (36463).

The spelling of 36072391 in words is "thirty-six million, seventy-two thousand, three hundred ninety-one".