245791439 has 2 divisors, whose sum is σ = 245791440. Its totient is φ = 245791438.

The previous prime is 245791379. The next prime is 245791471. The reversal of 245791439 is 934197542.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245791439 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 245791439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245791489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122895719 + 122895720.

It is an arithmetic number, because the mean of its divisors is an integer number (122895720).

Almost surely, 2^245791439 is an apocalyptic number.

245791439 is a deficient number, since it is larger than the sum of its proper divisors (1).

245791439 is an equidigital number, since it uses as much as digits as its factorization.

245791439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 44.

The square root of 245791439 is about 15677.7370497148. The cubic root of 245791439 is about 626.4055314142.

The spelling of 245791439 in words is "two hundred forty-five million, seven hundred ninety-one thousand, four hundred thirty-nine".