36787021 has 4 divisors (see below), whose sum is σ = 38723200. Its totient is φ = 34850844.

The previous prime is 36787007. The next prime is 36787033. The reversal of 36787021 is 12078763.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12078763 = 1609 ⋅7507.

It is a cyclic number.

It is not a de Polignac number, because 36787021 - 2⁵ = 36786989 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 (36787001) 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, 968061 + ... + 968098.

It is an arithmetic number, because the mean of its divisors is an integer number (9680800).

Almost surely, 2^36787021 is an apocalyptic number.

It is an amenable number.

36787021 is a deficient number, since it is larger than the sum of its proper divisors (1936179).

36787021 is a wasteful number, since it uses less digits than its factorization.

36787021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1936178.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 36787021 is about 6065.2304985054. The cubic root of 36787021 is about 332.5815911477.

The spelling of 36787021 in words is "thirty-six million, seven hundred eighty-seven thousand, twenty-one".