39948397 has 2 divisors, whose sum is σ = 39948398. Its totient is φ = 39948396.

The previous prime is 39948373. The next prime is 39948421. The reversal of 39948397 is 79384993.

It is a balanced prime because it is at equal distance from previous prime (39948373) and next prime (39948421).

It can be written as a sum of positive squares in only one way, i.e., 31573161 + 8375236 = 5619^2 + 2894^2 .

It is an emirp because it is prime and its reverse (79384993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39948397 - 2¹⁹ = 39424109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39948347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19974198 + 19974199.

It is an arithmetic number, because the mean of its divisors is an integer number (19974199).

Almost surely, 2^39948397 is an apocalyptic number.

It is an amenable number.

39948397 is a deficient number, since it is larger than the sum of its proper divisors (1).

39948397 is an equidigital number, since it uses as much as digits as its factorization.

39948397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1469664, while the sum is 52.

The square root of 39948397 is about 6320.4744283954. The cubic root of 39948397 is about 341.8480595664.

The spelling of 39948397 in words is "thirty-nine million, nine hundred forty-eight thousand, three hundred ninety-seven".