36875981 has 2 divisors, whose sum is σ = 36875982. Its totient is φ = 36875980.

The previous prime is 36875977. The next prime is 36875989. The reversal of 36875981 is 18957863.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30580900 + 6295081 = 5530^2 + 2509^2 .

It is an emirp because it is prime and its reverse (18957863) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36875981 - 2² = 36875977 is a prime.

It is a super-2 number, since 2×36875981² = 2719675949424722, which contains 22 as substring.

It is a Sophie Germain prime.

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 (36875989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18437990 + 18437991.

It is an arithmetic number, because the mean of its divisors is an integer number (18437991).

Almost surely, 2^36875981 is an apocalyptic number.

It is an amenable number.

36875981 is a deficient number, since it is larger than the sum of its proper divisors (1).

36875981 is an equidigital number, since it uses as much as digits as its factorization.

36875981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 47.

The square root of 36875981 is about 6072.5596744701. The cubic root of 36875981 is about 332.8494631711.

The spelling of 36875981 in words is "thirty-six million, eight hundred seventy-five thousand, nine hundred eighty-one".