36631997 has 2 divisors, whose sum is σ = 36631998. Its totient is φ = 36631996.

The previous prime is 36631949. The next prime is 36632039. The reversal of 36631997 is 79913663.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35868121 + 763876 = 5989^2 + 874^2 .

It is an emirp because it is prime and its reverse (79913663) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36631997 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36631937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18315998 + 18315999.

It is an arithmetic number, because the mean of its divisors is an integer number (18315999).

Almost surely, 2^36631997 is an apocalyptic number.

It is an amenable number.

36631997 is a deficient number, since it is larger than the sum of its proper divisors (1).

36631997 is an equidigital number, since it uses as much as digits as its factorization.

36631997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 183708, while the sum is 44.

The square root of 36631997 is about 6052.4372776593. The cubic root of 36631997 is about 332.1137565616.

The spelling of 36631997 in words is "thirty-six million, six hundred thirty-one thousand, nine hundred ninety-seven".