36784991 has 4 divisors (see below), whose sum is σ = 38948832. Its totient is φ = 34621152.

The previous prime is 36784967. The next prime is 36784999. The reversal of 36784991 is 19948763.

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 36784991 - 2⁶ = 36784927 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 (36784999) 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, 1081895 + ... + 1081928.

It is an arithmetic number, because the mean of its divisors is an integer number (9737208).

Almost surely, 2^36784991 is an apocalyptic number.

36784991 is a deficient number, since it is larger than the sum of its proper divisors (2163841).

36784991 is a wasteful number, since it uses less digits than its factorization.

36784991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2163840.

The product of its digits is 326592, while the sum is 47.

The square root of 36784991 is about 6065.0631488881. The cubic root of 36784991 is about 332.5754734734.

It can be divided in two parts, 367 and 84991, that added together give a palindrome (85358).

The spelling of 36784991 in words is "thirty-six million, seven hundred eighty-four thousand, nine hundred ninety-one".