36720647 has 4 divisors (see below), whose sum is σ = 37905216. Its totient is φ = 35536080.

The previous prime is 36720637. The next prime is 36720659. The reversal of 36720647 is 74602763.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74602763 = 7393 ⋅10091.

It is a cyclic number.

It is not a de Polignac number, because 36720647 - 2⁴ = 36720631 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 (36720617) 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, 592238 + ... + 592299.

It is an arithmetic number, because the mean of its divisors is an integer number (9476304).

Almost surely, 2^36720647 is an apocalyptic number.

36720647 is a deficient number, since it is larger than the sum of its proper divisors (1184569).

36720647 is a wasteful number, since it uses less digits than its factorization.

36720647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184568.

The product of its (nonzero) digits is 42336, while the sum is 35.

The square root of 36720647 is about 6059.7563482371. The cubic root of 36720647 is about 332.3814475501.

The spelling of 36720647 in words is "thirty-six million, seven hundred twenty thousand, six hundred forty-seven".