6400697 has 2 divisors, whose sum is σ = 6400698. Its totient is φ = 6400696.

The previous prime is 6400657. The next prime is 6400717. The reversal of 6400697 is 7960046.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4280761 + 2119936 = 2069^2 + 1456^2 .

It is a cyclic number.

It is not a de Polignac number, because 6400697 - 2²⁰ = 5352121 is a prime.

It is a Chen prime.

It is equal to p₄₃₈₄₄₉ and since 6400697 and 438449 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (6400607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3200348 + 3200349.

It is an arithmetic number, because the mean of its divisors is an integer number (3200349).

Almost surely, 2^6400697 is an apocalyptic number.

It is an amenable number.

6400697 is a deficient number, since it is larger than the sum of its proper divisors (1).

6400697 is an equidigital number, since it uses as much as digits as its factorization.

6400697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 6400697 is about 2529.9598811048. The cubic root of 6400697 is about 185.6702930736.

The spelling of 6400697 in words is "six million, four hundred thousand, six hundred ninety-seven".