214727437693 has 2 divisors, whose sum is σ = 214727437694. Its totient is φ = 214727437692.

The previous prime is 214727437637. The next prime is 214727437753. The reversal of 214727437693 is 396734727412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113398542009 + 101328895684 = 336747^2 + 318322^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-214727437693 is a prime.

It is a super-2 number, since 2×214727437693² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211727437693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107363718846 + 107363718847.

It is an arithmetic number, because the mean of its divisors is an integer number (107363718847).

Almost surely, 2^214727437693 is an apocalyptic number.

It is an amenable number.

214727437693 is a deficient number, since it is larger than the sum of its proper divisors (1).

214727437693 is an equidigital number, since it uses as much as digits as its factorization.

214727437693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10668672, while the sum is 55.

The spelling of 214727437693 in words is "two hundred fourteen billion, seven hundred twenty-seven million, four hundred thirty-seven thousand, six hundred ninety-three".