2378639257 has 2 divisors, whose sum is σ = 2378639258. Its totient is φ = 2378639256.

The previous prime is 2378639243. The next prime is 2378639297. The reversal of 2378639257 is 7529368732.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2174263641 + 204375616 = 46629^2 + 14296^2 .

It is a cyclic number.

It is not a de Polignac number, because 2378639257 - 2³¹ = 231155609 is a prime.

It is not a weakly prime, because it can be changed into another prime (2378639297) 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, 1189319628 + 1189319629.

It is an arithmetic number, because the mean of its divisors is an integer number (1189319629).

Almost surely, 2^2378639257 is an apocalyptic number.

It is an amenable number.

2378639257 is a deficient number, since it is larger than the sum of its proper divisors (1).

2378639257 is an equidigital number, since it uses as much as digits as its factorization.

2378639257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3810240, while the sum is 52.

The square root of 2378639257 is about 48771.2954205647. The cubic root of 2378639257 is about 1334.8819502193.

The spelling of 2378639257 in words is "two billion, three hundred seventy-eight million, six hundred thirty-nine thousand, two hundred fifty-seven".