6990515123 has 2 divisors, whose sum is σ = 6990515124. Its totient is φ = 6990515122.

The previous prime is 6990515099. The next prime is 6990515153. The reversal of 6990515123 is 3215150996.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6990515123 - 2¹⁰ = 6990514099 is a prime.

It is not a weakly prime, because it can be changed into another prime (6990515153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3495257561 + 3495257562.

It is an arithmetic number, because the mean of its divisors is an integer number (3495257562).

Almost surely, 2^6990515123 is an apocalyptic number.

6990515123 is a deficient number, since it is larger than the sum of its proper divisors (1).

6990515123 is an equidigital number, since it uses as much as digits as its factorization.

6990515123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72900, while the sum is 41.

The square root of 6990515123 is about 83609.3004575448. The cubic root of 6990515123 is about 1912.0667961986.

The spelling of 6990515123 in words is "six billion, nine hundred ninety million, five hundred fifteen thousand, one hundred twenty-three".