39948289 has 2 divisors, whose sum is σ = 39948290. Its totient is φ = 39948288.

The previous prime is 39948253. The next prime is 39948299. The reversal of 39948289 is 98284993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37307664 + 2640625 = 6108^2 + 1625^2 .

It is a cyclic number.

It is not a de Polignac number, because 39948289 - 2⁹ = 39947777 is a prime.

It is not a weakly prime, because it can be changed into another prime (39948239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19974144 + 19974145.

It is an arithmetic number, because the mean of its divisors is an integer number (19974145).

Almost surely, 2^39948289 is an apocalyptic number.

It is an amenable number.

39948289 is a deficient number, since it is larger than the sum of its proper divisors (1).

39948289 is an equidigital number, since it uses as much as digits as its factorization.

39948289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 52.

The square root of 39948289 is about 6320.4658847272. The cubic root of 39948289 is about 341.8477515055.

The spelling of 39948289 in words is "thirty-nine million, nine hundred forty-eight thousand, two hundred eighty-nine".