36647421 has 4 divisors (see below), whose sum is σ = 48863232. Its totient is φ = 24431612.

The previous prime is 36647417. The next prime is 36647423. The reversal of 36647421 is 12474663.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 36647421 - 2² = 36647417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36647423) 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, 6107901 + ... + 6107906.

It is an arithmetic number, because the mean of its divisors is an integer number (12215808).

Almost surely, 2^36647421 is an apocalyptic number.

It is an amenable number.

36647421 is a deficient number, since it is larger than the sum of its proper divisors (12215811).

36647421 is a wasteful number, since it uses less digits than its factorization.

36647421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12215810.

The product of its digits is 24192, while the sum is 33.

The square root of 36647421 is about 6053.7113409874. The cubic root of 36647421 is about 332.1603624819.

The spelling of 36647421 in words is "thirty-six million, six hundred forty-seven thousand, four hundred twenty-one".