6987138343 has 2 divisors, whose sum is σ = 6987138344. Its totient is φ = 6987138342.

The previous prime is 6987138269. The next prime is 6987138373. The reversal of 6987138343 is 3438317896.

It is a happy number.

6987138343 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6987138343 - 2²¹ = 6985041191 is a prime.

It is a super-3 number, since 3×6987138343³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6987138373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3493569171 + 3493569172.

It is an arithmetic number, because the mean of its divisors is an integer number (3493569172).

Almost surely, 2^6987138343 is an apocalyptic number.

6987138343 is a deficient number, since it is larger than the sum of its proper divisors (1).

6987138343 is an equidigital number, since it uses as much as digits as its factorization.

6987138343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 52.

The square root of 6987138343 is about 83589.1042122118. The cubic root of 6987138343 is about 1911.7588709261.

The spelling of 6987138343 in words is "six billion, nine hundred eighty-seven million, one hundred thirty-eight thousand, three hundred forty-three".