36994021 has 2 divisors, whose sum is σ = 36994022. Its totient is φ = 36994020.

The previous prime is 36994019. The next prime is 36994037. The reversal of 36994021 is 12049963.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32092225 + 4901796 = 5665^2 + 2214^2 .

It is an emirp because it is prime and its reverse (12049963) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36994021 - 2¹ = 36994019 is a prime.

Together with 36994019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36994081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18497010 + 18497011.

It is an arithmetic number, because the mean of its divisors is an integer number (18497011).

Almost surely, 2^36994021 is an apocalyptic number.

It is an amenable number.

36994021 is a deficient number, since it is larger than the sum of its proper divisors (1).

36994021 is an equidigital number, since it uses as much as digits as its factorization.

36994021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 36994021 is about 6082.2710396693. The cubic root of 36994021 is about 333.2042352297.

The spelling of 36994021 in words is "thirty-six million, nine hundred ninety-four thousand, twenty-one".