39956089 has 2 divisors, whose sum is σ = 39956090. Its totient is φ = 39956088.

The previous prime is 39956087. The next prime is 39956123. The reversal of 39956089 is 98065993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39942400 + 13689 = 6320^2 + 117^2 .

It is an emirp because it is prime and its reverse (98065993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39956089 - 2¹ = 39956087 is a prime.

Together with 39956087, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (39956087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19978044 + 19978045.

It is an arithmetic number, because the mean of its divisors is an integer number (19978045).

Almost surely, 2^39956089 is an apocalyptic number.

It is an amenable number.

39956089 is a deficient number, since it is larger than the sum of its proper divisors (1).

39956089 is an equidigital number, since it uses as much as digits as its factorization.

39956089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 524880, while the sum is 49.

The square root of 39956089 is about 6321.0828977320. The cubic root of 39956089 is about 341.8699989242.

The spelling of 39956089 in words is "thirty-nine million, nine hundred fifty-six thousand, eighty-nine".