36821693 has 4 divisors (see below), whose sum is σ = 36866940. Its totient is φ = 36776448.

The previous prime is 36821683. The next prime is 36821699. The reversal of 36821693 is 39612863.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8922169 + 27899524 = 2987^2 + 5282^2 .

It is a cyclic number.

It is not a de Polignac number, because 36821693 - 2¹⁰ = 36820669 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 (36821699) 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, 21380 + ... + 23037.

It is an arithmetic number, because the mean of its divisors is an integer number (9216735).

Almost surely, 2^36821693 is an apocalyptic number.

It is an amenable number.

36821693 is a deficient number, since it is larger than the sum of its proper divisors (45247).

36821693 is an equidigital number, since it uses as much as digits as its factorization.

36821693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45246.

The product of its digits is 46656, while the sum is 38.

The square root of 36821693 is about 6068.0880843969. The cubic root of 36821693 is about 332.6860450896.

The spelling of 36821693 in words is "thirty-six million, eight hundred twenty-one thousand, six hundred ninety-three".