36661973 has 2 divisors, whose sum is σ = 36661974. Its totient is φ = 36661972.

The previous prime is 36661967. The next prime is 36661981. The reversal of 36661973 is 37916663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35129329 + 1532644 = 5927^2 + 1238^2 .

It is a cyclic number.

It is not a de Polignac number, because 36661973 - 2⁴ = 36661957 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 36661973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36661903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18330986 + 18330987.

It is an arithmetic number, because the mean of its divisors is an integer number (18330987).

Almost surely, 2^36661973 is an apocalyptic number.

It is an amenable number.

36661973 is a deficient number, since it is larger than the sum of its proper divisors (1).

36661973 is an equidigital number, since it uses as much as digits as its factorization.

36661973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 41.

The square root of 36661973 is about 6054.9131290218. The cubic root of 36661973 is about 332.2043215367.

The spelling of 36661973 in words is "thirty-six million, six hundred sixty-one thousand, nine hundred seventy-three".