343999639849 has 2 divisors, whose sum is σ = 343999639850. Its totient is φ = 343999639848.

The previous prime is 343999639829. The next prime is 343999639883. The reversal of 343999639849 is 948936999343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 305698410000 + 38301229849 = 552900^2 + 195707^2 .

It is a cyclic number.

It is not a de Polignac number, because 343999639849 - 2¹⁹ = 343999115561 is a prime.

It is not a weakly prime, because it can be changed into another prime (343999639829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171999819924 + 171999819925.

It is an arithmetic number, because the mean of its divisors is an integer number (171999819925).

Almost surely, 2^343999639849 is an apocalyptic number.

It is an amenable number.

343999639849 is a deficient number, since it is larger than the sum of its proper divisors (1).

343999639849 is an equidigital number, since it uses as much as digits as its factorization.

343999639849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224440064, while the sum is 76.

The spelling of 343999639849 in words is "three hundred forty-three billion, nine hundred ninety-nine million, six hundred thirty-nine thousand, eight hundred forty-nine".