38719561 has 2 divisors, whose sum is σ = 38719562. Its totient is φ = 38719560.

The previous prime is 38719547. The next prime is 38719607. The reversal of 38719561 is 16591783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38007225 + 712336 = 6165^2 + 844^2 .

It is a cyclic number.

It is not a de Polignac number, because 38719561 - 2⁷ = 38719433 is a prime.

It is not a weakly prime, because it can be changed into another prime (38719861) 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, 19359780 + 19359781.

It is an arithmetic number, because the mean of its divisors is an integer number (19359781).

Almost surely, 2^38719561 is an apocalyptic number.

It is an amenable number.

38719561 is a deficient number, since it is larger than the sum of its proper divisors (1).

38719561 is an equidigital number, since it uses as much as digits as its factorization.

38719561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 40.

The square root of 38719561 is about 6222.5043993556. The cubic root of 38719561 is about 338.3063437639.

The spelling of 38719561 in words is "thirty-eight million, seven hundred nineteen thousand, five hundred sixty-one".