36931861 has 2 divisors, whose sum is σ = 36931862. Its totient is φ = 36931860.

The previous prime is 36931847. The next prime is 36931879. The reversal of 36931861 is 16813963.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32547025 + 4384836 = 5705^2 + 2094^2 .

It is an emirp because it is prime and its reverse (16813963) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36931861 - 2⁷ = 36931733 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 36931861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36931841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18465930 + 18465931.

It is an arithmetic number, because the mean of its divisors is an integer number (18465931).

Almost surely, 2^36931861 is an apocalyptic number.

It is an amenable number.

36931861 is a deficient number, since it is larger than the sum of its proper divisors (1).

36931861 is an equidigital number, since it uses as much as digits as its factorization.

36931861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 37.

The square root of 36931861 is about 6077.1589579342. The cubic root of 36931861 is about 333.0175060762.

The spelling of 36931861 in words is "thirty-six million, nine hundred thirty-one thousand, eight hundred sixty-one".