36782981 has 2 divisors, whose sum is σ = 36782982. Its totient is φ = 36782980.

The previous prime is 36782923. The next prime is 36782983. The reversal of 36782981 is 18928763.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28569025 + 8213956 = 5345^2 + 2866^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36782981 is a prime.

It is a super-2 number, since 2×36782981² = 2705975382492722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 36782983, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36782983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18391490 + 18391491.

It is an arithmetic number, because the mean of its divisors is an integer number (18391491).

Almost surely, 2^36782981 is an apocalyptic number.

It is an amenable number.

36782981 is a deficient number, since it is larger than the sum of its proper divisors (1).

36782981 is an equidigital number, since it uses as much as digits as its factorization.

36782981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

The square root of 36782981 is about 6064.8974434858. The cubic root of 36782981 is about 332.5694158499.

The spelling of 36782981 in words is "thirty-six million, seven hundred eighty-two thousand, nine hundred eighty-one".