214561685389 has 2 divisors, whose sum is σ = 214561685390. Its totient is φ = 214561685388.

The previous prime is 214561685363. The next prime is 214561685441. The reversal of 214561685389 is 983586165412.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213106873225 + 1454812164 = 461635^2 + 38142^2 .

It is a cyclic number.

It is not a de Polignac number, because 214561685389 - 2⁵ = 214561685357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (214561685309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107280842694 + 107280842695.

It is an arithmetic number, because the mean of its divisors is an integer number (107280842695).

Almost surely, 2^214561685389 is an apocalyptic number.

It is an amenable number.

214561685389 is a deficient number, since it is larger than the sum of its proper divisors (1).

214561685389 is an equidigital number, since it uses as much as digits as its factorization.

214561685389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12441600, while the sum is 58.

The spelling of 214561685389 in words is "two hundred fourteen billion, five hundred sixty-one million, six hundred eighty-five thousand, three hundred eighty-nine".