42343913639 has 2 divisors, whose sum is σ = 42343913640. Its totient is φ = 42343913638.

The previous prime is 42343913533. The next prime is 42343913719. The reversal of 42343913639 is 93631934324.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42343913639 - 2⁸ = 42343913383 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42343913593 and 42343913602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42343913239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21171956819 + 21171956820.

It is an arithmetic number, because the mean of its divisors is an integer number (21171956820).

Almost surely, 2^42343913639 is an apocalyptic number.

42343913639 is a deficient number, since it is larger than the sum of its proper divisors (1).

42343913639 is an equidigital number, since it uses as much as digits as its factorization.

42343913639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1259712, while the sum is 47.

The spelling of 42343913639 in words is "forty-two billion, three hundred forty-three million, nine hundred thirteen thousand, six hundred thirty-nine".