6399269 has 2 divisors, whose sum is σ = 6399270. Its totient is φ = 6399268.

The previous prime is 6399251. The next prime is 6399277. The reversal of 6399269 is 9629936.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6315169 + 84100 = 2513^2 + 290^2 .

It is a cyclic number.

It is not a de Polignac number, because 6399269 - 2⁸ = 6399013 is a prime.

It is a super-2 number, since 2×6399269² = 81901287468722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6399209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3199634 + 3199635.

It is an arithmetic number, because the mean of its divisors is an integer number (3199635).

Almost surely, 2^6399269 is an apocalyptic number.

It is an amenable number.

6399269 is a deficient number, since it is larger than the sum of its proper divisors (1).

6399269 is an equidigital number, since it uses as much as digits as its factorization.

6399269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 157464, while the sum is 44.

The square root of 6399269 is about 2529.6776474484. The cubic root of 6399269 is about 185.6564843224.

The spelling of 6399269 in words is "six million, three hundred ninety-nine thousand, two hundred sixty-nine".