36721693 has 2 divisors, whose sum is σ = 36721694. Its totient is φ = 36721692.

The previous prime is 36721687. The next prime is 36721757. The reversal of 36721693 is 39612763.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18896409 + 17825284 = 4347^2 + 4222^2 .

It is a cyclic number.

It is not a de Polignac number, because 36721693 - 2¹⁷ = 36590621 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36721673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18360846 + 18360847.

It is an arithmetic number, because the mean of its divisors is an integer number (18360847).

Almost surely, 2^36721693 is an apocalyptic number.

It is an amenable number.

36721693 is a deficient number, since it is larger than the sum of its proper divisors (1).

36721693 is an equidigital number, since it uses as much as digits as its factorization.

36721693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 37.

The square root of 36721693 is about 6059.8426547230. The cubic root of 36721693 is about 332.3846035193.

The spelling of 36721693 in words is "thirty-six million, seven hundred twenty-one thousand, six hundred ninety-three".