6899497973 has 2 divisors, whose sum is σ = 6899497974. Its totient is φ = 6899497972.

The previous prime is 6899497931. The next prime is 6899498017. The reversal of 6899497973 is 3797949986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3666665809 + 3232832164 = 60553^2 + 56858^2 .

It is a cyclic number.

It is not a de Polignac number, because 6899497973 - 2¹⁸ = 6899235829 is a prime.

It is a super-2 number, since 2×6899497973² = 95206144558862217458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6899497897 and 6899497906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6899497273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3449748986 + 3449748987.

It is an arithmetic number, because the mean of its divisors is an integer number (3449748987).

Almost surely, 2^6899497973 is an apocalyptic number.

It is an amenable number.

6899497973 is a deficient number, since it is larger than the sum of its proper divisors (1).

6899497973 is an equidigital number, since it uses as much as digits as its factorization.

6899497973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 185177664, while the sum is 71.

The square root of 6899497973 is about 83063.2167267799. The cubic root of 6899497973 is about 1903.7320894382.

The spelling of 6899497973 in words is "six billion, eight hundred ninety-nine million, four hundred ninety-seven thousand, nine hundred seventy-three".