6635397 has 16 divisors (see below), whose sum is σ = 9106560. Its totient is φ = 4296000.

The previous prime is 6635359. The next prime is 6635407. The reversal of 6635397 is 7935366.

It is not a de Polignac number, because 6635397 - 2¹⁸ = 6373253 is a prime.

It is a d-powerful number, because it can be written as 6² + 6⁷ + 3¹⁰ + 5³ + 3¹² + 9 + 7⁸ .

6635397 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6635327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18304 + ... + 18662.

It is an arithmetic number, because the mean of its divisors is an integer number (569160).

Almost surely, 2^6635397 is an apocalyptic number.

It is an amenable number.

6635397 is a deficient number, since it is larger than the sum of its proper divisors (2471163).

6635397 is a wasteful number, since it uses less digits than its factorization.

6635397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524.

The product of its digits is 102060, while the sum is 39.

The square root of 6635397 is about 2575.9264352850. The cubic root of 6635397 is about 187.9124856754.

The spelling of 6635397 in words is "six million, six hundred thirty-five thousand, three hundred ninety-seven".