39086561 has 2 divisors, whose sum is σ = 39086562. Its totient is φ = 39086560.

The previous prime is 39086549. The next prime is 39086581. The reversal of 39086561 is 16568093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38688400 + 398161 = 6220^2 + 631^2 .

It is an emirp because it is prime and its reverse (16568093) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39086561 - 2¹⁰ = 39085537 is a prime.

It is not a weakly prime, because it can be changed into another prime (39086581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19543280 + 19543281.

It is an arithmetic number, because the mean of its divisors is an integer number (19543281).

Almost surely, 2^39086561 is an apocalyptic number.

It is an amenable number.

39086561 is a deficient number, since it is larger than the sum of its proper divisors (1).

39086561 is an equidigital number, since it uses as much as digits as its factorization.

39086561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 39086561 is about 6251.9245836782. The cubic root of 39086561 is about 339.3718534845.

The spelling of 39086561 in words is "thirty-nine million, eighty-six thousand, five hundred sixty-one".