6438697 has 2 divisors, whose sum is σ = 6438698. Its totient is φ = 6438696.

The previous prime is 6438661. The next prime is 6438721. The reversal of 6438697 is 7968346.

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., 6370576 + 68121 = 2524^2 + 261^2 .

It is a cyclic number.

It is not a de Polignac number, because 6438697 - 2¹⁵ = 6405929 is a prime.

It is a d-powerful number, because it can be written as 6³ + 4¹¹ + 3¹² + 8⁵ + 6⁸ + 9 + 7³ .

It is not a weakly prime, because it can be changed into another prime (6438617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3219348 + 3219349.

It is an arithmetic number, because the mean of its divisors is an integer number (3219349).

Almost surely, 2^6438697 is an apocalyptic number.

It is an amenable number.

6438697 is a deficient number, since it is larger than the sum of its proper divisors (1).

6438697 is an equidigital number, since it uses as much as digits as its factorization.

6438697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 43.

The square root of 6438697 is about 2537.4587681379. The cubic root of 6438697 is about 186.0370007710.

The spelling of 6438697 in words is "six million, four hundred thirty-eight thousand, six hundred ninety-seven".