427702889951993 has 2 divisors, whose sum is σ = 427702889951994. Its totient is φ = 427702889951992.

The previous prime is 427702889951969. The next prime is 427702889952061. The reversal of 427702889951993 is 399159988207724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 267791361806224 + 159911528145769 = 16364332^2 + 12645613^2 .

It is a cyclic number.

It is not a de Polignac number, because 427702889951993 - 2⁶ = 427702889951929 is a prime.

It is not a weakly prime, because it can be changed into another prime (427702889951093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213851444975996 + 213851444975997.

It is an arithmetic number, because the mean of its divisors is an integer number (213851444975997).

Almost surely, 2^{427702889951993} is an apocalyptic number.

It is an amenable number.

427702889951993 is a deficient number, since it is larger than the sum of its proper divisors (1).

427702889951993 is an equidigital number, since it uses as much as digits as its factorization.

427702889951993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4938071040, while the sum is 83.

The spelling of 427702889951993 in words is "four hundred twenty-seven trillion, seven hundred two billion, eight hundred eighty-nine million, nine hundred fifty-one thousand, nine hundred ninety-three".