38061721 has 2 divisors, whose sum is σ = 38061722. Its totient is φ = 38061720.

The previous prime is 38061697. The next prime is 38061763. The reversal of 38061721 is 12716083.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34105600 + 3956121 = 5840^2 + 1989^2 .

It is a cyclic number.

It is not a de Polignac number, because 38061721 - 2⁷ = 38061593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38061721.

It is not a weakly prime, because it can be changed into another prime (38061781) 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, 19030860 + 19030861.

It is an arithmetic number, because the mean of its divisors is an integer number (19030861).

Almost surely, 2^38061721 is an apocalyptic number.

It is an amenable number.

38061721 is a deficient number, since it is larger than the sum of its proper divisors (1).

38061721 is an equidigital number, since it uses as much as digits as its factorization.

38061721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 38061721 is about 6169.4182059575. The cubic root of 38061721 is about 336.3794636973.

The spelling of 38061721 in words is "thirty-eight million, sixty-one thousand, seven hundred twenty-one".