2440393939 has 2 divisors, whose sum is σ = 2440393940. Its totient is φ = 2440393938.

The previous prime is 2440393937. The next prime is 2440394009. The reversal of 2440393939 is 9393930442.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2440393939 - 2¹ = 2440393937 is a prime.

Together with 2440393937, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2440393937) 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, 1220196969 + 1220196970.

It is an arithmetic number, because the mean of its divisors is an integer number (1220196970).

Almost surely, 2^2440393939 is an apocalyptic number.

2440393939 is a deficient number, since it is larger than the sum of its proper divisors (1).

2440393939 is an equidigital number, since it uses as much as digits as its factorization.

2440393939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 629856, while the sum is 46.

The square root of 2440393939 is about 49400.3435109514. The cubic root of 2440393939 is about 1346.3355471307.

The spelling of 2440393939 in words is "two billion, four hundred forty million, three hundred ninety-three thousand, nine hundred thirty-nine".