6402969 has 20 divisors (see below), whose sum is σ = 9651444. Its totient is φ = 4230144.

The previous prime is 6402967. The next prime is 6402971. The reversal of 6402969 is 9692046.

6402969 is a `hidden beast` number, since 640 + 2 + 9 + 6 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (6402967) and next prime (6402971).

It can be written as a sum of positive squares in 2 ways, for example, as 5475600 + 927369 = 2340^2 + 963^2 .

It is not a de Polignac number, because 6402969 - 2¹ = 6402967 is a prime.

It is a super-2 number, since 2×6402969² = 81996024029922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6402967) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10809 + ... + 11385.

Almost surely, 2^6402969 is an apocalyptic number.

It is an amenable number.

6402969 is a deficient number, since it is larger than the sum of its proper divisors (3248475).

6402969 is a wasteful number, since it uses less digits than its factorization.

6402969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726 (or 717 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 6402969 is about 2530.4088602437. The cubic root of 6402969 is about 185.6922590670.

The spelling of 6402969 in words is "six million, four hundred two thousand, nine hundred sixty-nine".