36697621 has 2 divisors, whose sum is σ = 36697622. Its totient is φ = 36697620.

The previous prime is 36697613. The next prime is 36697663. The reversal of 36697621 is 12679663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36663025 + 34596 = 6055^2 + 186^2 .

It is an emirp because it is prime and its reverse (12679663) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36697621 - 2³ = 36697613 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36697601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18348810 + 18348811.

It is an arithmetic number, because the mean of its divisors is an integer number (18348811).

Almost surely, 2^36697621 is an apocalyptic number.

It is an amenable number.

36697621 is a deficient number, since it is larger than the sum of its proper divisors (1).

36697621 is an equidigital number, since it uses as much as digits as its factorization.

36697621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 40.

The square root of 36697621 is about 6057.8561389323. The cubic root of 36697621 is about 332.3119588009.

The spelling of 36697621 in words is "thirty-six million, six hundred ninety-seven thousand, six hundred twenty-one".