36813971 has 2 divisors, whose sum is σ = 36813972. Its totient is φ = 36813970.

The previous prime is 36813967. The next prime is 36813979. The reversal of 36813971 is 17931863.

36813971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 36813971 - 2² = 36813967 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (36813979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18406985 + 18406986.

It is an arithmetic number, because the mean of its divisors is an integer number (18406986).

Almost surely, 2^36813971 is an apocalyptic number.

36813971 is a deficient number, since it is larger than the sum of its proper divisors (1).

36813971 is an equidigital number, since it uses as much as digits as its factorization.

36813971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 38.

The square root of 36813971 is about 6067.4517715430. The cubic root of 36813971 is about 332.6627872305.

The spelling of 36813971 in words is "thirty-six million, eight hundred thirteen thousand, nine hundred seventy-one".