39939089 has 2 divisors, whose sum is σ = 39939090. Its totient is φ = 39939088.

The previous prime is 39939041. The next prime is 39939139. The reversal of 39939089 is 98093993.

It is an a-pointer prime, because the next prime (39939139) can be obtained adding 39939089 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39790864 + 148225 = 6308^2 + 385^2 .

It is a cyclic number.

It is not a de Polignac number, because 39939089 - 2¹⁶ = 39873553 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (39938089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19969544 + 19969545.

It is an arithmetic number, because the mean of its divisors is an integer number (19969545).

Almost surely, 2^39939089 is an apocalyptic number.

It is an amenable number.

39939089 is a deficient number, since it is larger than the sum of its proper divisors (1).

39939089 is an equidigital number, since it uses as much as digits as its factorization.

39939089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 472392, while the sum is 50.

The square root of 39939089 is about 6319.7380483688. The cubic root of 39939089 is about 341.8215072378.

The spelling of 39939089 in words is "thirty-nine million, nine hundred thirty-nine thousand, eighty-nine".