245383139 has 2 divisors, whose sum is σ = 245383140. Its totient is φ = 245383138.

The previous prime is 245383111. The next prime is 245383147. The reversal of 245383139 is 931383542.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245383139 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (245382139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122691569 + 122691570.

It is an arithmetic number, because the mean of its divisors is an integer number (122691570).

Almost surely, 2^245383139 is an apocalyptic number.

245383139 is a deficient number, since it is larger than the sum of its proper divisors (1).

245383139 is an equidigital number, since it uses as much as digits as its factorization.

245383139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 38.

The square root of 245383139 is about 15664.7099877400. The cubic root of 245383139 is about 626.0584849766.

The spelling of 245383139 in words is "two hundred forty-five million, three hundred eighty-three thousand, one hundred thirty-nine".