6999999999973 has 2 divisors, whose sum is σ = 6999999999974. Its totient is φ = 6999999999972.

The previous prime is 6999999999931. The next prime is 7000000000009. The reversal of 6999999999973 is 3799999999996.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5617122782209 + 1382877217764 = 2370047^2 + 1175958^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6999999999973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6999999999373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3499999999986 + 3499999999987.

It is an arithmetic number, because the mean of its divisors is an integer number (3499999999987).

Almost surely, 2^{6999999999973} is an apocalyptic number.

It is an amenable number.

6999999999973 is a deficient number, since it is larger than the sum of its proper divisors (1).

6999999999973 is an equidigital number, since it uses as much as digits as its factorization.

6999999999973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 439334834526, while the sum is 106.

The spelling of 6999999999973 in words is "six trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred seventy-three".