2145054839 has 2 divisors, whose sum is σ = 2145054840. Its totient is φ = 2145054838.

The previous prime is 2145054833. The next prime is 2145054893. The reversal of 2145054839 is 9384505412.

Together with next prime (2145054893) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2145054839 - 2⁴ = 2145054823 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 2145054796 and 2145054805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2145054833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072527419 + 1072527420.

It is an arithmetic number, because the mean of its divisors is an integer number (1072527420).

Almost surely, 2^2145054839 is an apocalyptic number.

2145054839 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145054839 is an equidigital number, since it uses as much as digits as its factorization.

2145054839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 2145054839 is about 46314.7367368098. The cubic root of 2145054839 is about 1289.6725806057.

The spelling of 2145054839 in words is "two billion, one hundred forty-five million, fifty-four thousand, eight hundred thirty-nine".