642313313273 has 2 divisors, whose sum is σ = 642313313274. Its totient is φ = 642313313272.

The previous prime is 642313313237. The next prime is 642313313297. The reversal of 642313313273 is 372313313246.

Together with previous prime (642313313237) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 518245931449 + 124067381824 = 719893^2 + 352232^2 .

It is a cyclic number.

It is not a de Polignac number, because 642313313273 - 2³⁸ = 367435406329 is a prime.

It is not a weakly prime, because it can be changed into another prime (642313313573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321156656636 + 321156656637.

It is an arithmetic number, because the mean of its divisors is an integer number (321156656637).

Almost surely, 2^642313313273 is an apocalyptic number.

It is an amenable number.

642313313273 is a deficient number, since it is larger than the sum of its proper divisors (1).

642313313273 is an equidigital number, since it uses as much as digits as its factorization.

642313313273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 38.

The spelling of 642313313273 in words is "six hundred forty-two billion, three hundred thirteen million, three hundred thirteen thousand, two hundred seventy-three".