39303997 has 2 divisors, whose sum is σ = 39303998. Its totient is φ = 39303996.

The previous prime is 39303991. The next prime is 39304037. The reversal of 39303997 is 79930393.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20693401 + 18610596 = 4549^2 + 4314^2 .

It is an emirp because it is prime and its reverse (79930393) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39303997 - 2¹¹ = 39301949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39303991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19651998 + 19651999.

It is an arithmetic number, because the mean of its divisors is an integer number (19651999).

Almost surely, 2^39303997 is an apocalyptic number.

It is an amenable number.

39303997 is a deficient number, since it is larger than the sum of its proper divisors (1).

39303997 is an equidigital number, since it uses as much as digits as its factorization.

39303997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 137781, while the sum is 43.

The square root of 39303997 is about 6269.2899916976. The cubic root of 39303997 is about 339.9999913495. Note that the first 5 decimals are identical.

The spelling of 39303997 in words is "thirty-nine million, three hundred three thousand, nine hundred ninety-seven".