36713981 has 2 divisors, whose sum is σ = 36713982. Its totient is φ = 36713980.

The previous prime is 36713977. The next prime is 36714019. The reversal of 36713981 is 18931763.

It is an a-pointer prime, because the next prime (36714019) can be obtained adding 36713981 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36711481 + 2500 = 6059^2 + 50^2 .

It is a cyclic number.

It is not a de Polignac number, because 36713981 - 2² = 36713977 is a prime.

It is a super-2 number, since 2×36713981² = 2695832801736722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36713921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18356990 + 18356991.

It is an arithmetic number, because the mean of its divisors is an integer number (18356991).

Almost surely, 2^36713981 is an apocalyptic number.

It is an amenable number.

36713981 is a deficient number, since it is larger than the sum of its proper divisors (1).

36713981 is an equidigital number, since it uses as much as digits as its factorization.

36713981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 38.

The square root of 36713981 is about 6059.2063011586. The cubic root of 36713981 is about 332.3613336269.

The spelling of 36713981 in words is "thirty-six million, seven hundred thirteen thousand, nine hundred eighty-one".