38720641 has 2 divisors, whose sum is σ = 38720642. Its totient is φ = 38720640.

The previous prime is 38720623. The next prime is 38720653. The reversal of 38720641 is 14602783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37271025 + 1449616 = 6105^2 + 1204^2 .

It is a cyclic number.

It is not a de Polignac number, because 38720641 - 2¹¹ = 38718593 is a prime.

It is not a weakly prime, because it can be changed into another prime (38720041) 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, 19360320 + 19360321.

It is an arithmetic number, because the mean of its divisors is an integer number (19360321).

Almost surely, 2^38720641 is an apocalyptic number.

It is an amenable number.

38720641 is a deficient number, since it is larger than the sum of its proper divisors (1).

38720641 is an equidigital number, since it uses as much as digits as its factorization.

38720641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 38720641 is about 6222.5911805292. The cubic root of 38720641 is about 338.3094891806.

The spelling of 38720641 in words is "thirty-eight million, seven hundred twenty thousand, six hundred forty-one".