39816089 has 2 divisors, whose sum is σ = 39816090. Its totient is φ = 39816088.

The previous prime is 39816083. The next prime is 39816113. The reversal of 39816089 is 98061893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27510025 + 12306064 = 5245^2 + 3508^2 .

It is an emirp because it is prime and its reverse (98061893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39816089 - 2¹⁶ = 39750553 is a prime.

It is not a weakly prime, because it can be changed into another prime (39816083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19908044 + 19908045.

It is an arithmetic number, because the mean of its divisors is an integer number (19908045).

Almost surely, 2^39816089 is an apocalyptic number.

It is an amenable number.

39816089 is a deficient number, since it is larger than the sum of its proper divisors (1).

39816089 is an equidigital number, since it uses as much as digits as its factorization.

39816089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 39816089 is about 6309.9991283676. Note that the first 3 decimals coincide. The cubic root of 39816089 is about 341.4702450089.

The spelling of 39816089 in words is "thirty-nine million, eight hundred sixteen thousand, eighty-nine".