343145777749 has 2 divisors, whose sum is σ = 343145777750. Its totient is φ = 343145777748.

The previous prime is 343145777731. The next prime is 343145777813. The reversal of 343145777749 is 947777541343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 334410071524 + 8735706225 = 578282^2 + 93465^2 .

It is a cyclic number.

It is not a de Polignac number, because 343145777749 - 2⁵ = 343145777717 is a prime.

It is a super-2 number, since 2×343145777749² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343145717749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171572888874 + 171572888875.

It is an arithmetic number, because the mean of its divisors is an integer number (171572888875).

Almost surely, 2^343145777749 is an apocalyptic number.

It is an amenable number.

343145777749 is a deficient number, since it is larger than the sum of its proper divisors (1).

343145777749 is an equidigital number, since it uses as much as digits as its factorization.

343145777749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62233920, while the sum is 61.

The spelling of 343145777749 in words is "three hundred forty-three billion, one hundred forty-five million, seven hundred seventy-seven thousand, seven hundred forty-nine".