36622721 has 2 divisors, whose sum is σ = 36622722. Its totient is φ = 36622720.

The previous prime is 36622681. The next prime is 36622759. The reversal of 36622721 is 12722663.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34339600 + 2283121 = 5860^2 + 1511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36622721 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (36622771) 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, 18311360 + 18311361.

It is an arithmetic number, because the mean of its divisors is an integer number (18311361).

Almost surely, 2^36622721 is an apocalyptic number.

It is an amenable number.

36622721 is a deficient number, since it is larger than the sum of its proper divisors (1).

36622721 is an equidigital number, since it uses as much as digits as its factorization.

36622721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 29.

The square root of 36622721 is about 6051.6709262814. The cubic root of 36622721 is about 332.0857214418.

The spelling of 36622721 in words is "thirty-six million, six hundred twenty-two thousand, seven hundred twenty-one".