642007931143 has 2 divisors, whose sum is σ = 642007931144. Its totient is φ = 642007931142.

The previous prime is 642007931083. The next prime is 642007931177. The reversal of 642007931143 is 341139700246.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-642007931143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 642007931096 and 642007931105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642007931443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321003965571 + 321003965572.

It is an arithmetic number, because the mean of its divisors is an integer number (321003965572).

Almost surely, 2^642007931143 is an apocalyptic number.

642007931143 is a deficient number, since it is larger than the sum of its proper divisors (1).

642007931143 is an equidigital number, since it uses as much as digits as its factorization.

642007931143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 40.

The spelling of 642007931143 in words is "six hundred forty-two billion, seven million, nine hundred thirty-one thousand, one hundred forty-three".