6446969 has 4 divisors (see below), whose sum is σ = 6727296. Its totient is φ = 6166644.

The previous prime is 6446939. The next prime is 6446971. The reversal of 6446969 is 9696446.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9696446 = 2 ⋅4848223.

It is a cyclic number.

It is not a de Polignac number, because 6446969 - 2¹² = 6442873 is a prime.

It is a super-2 number, since 2×6446969² = 83126818573922, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

6446969 is a modest number, since divided by 6969 gives 644 as remainder.

It is not an unprimeable number, because it can be changed into a prime (6446929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140129 + ... + 140174.

It is an arithmetic number, because the mean of its divisors is an integer number (1681824).

Almost surely, 2^6446969 is an apocalyptic number.

It is an amenable number.

6446969 is a deficient number, since it is larger than the sum of its proper divisors (280327).

6446969 is a wasteful number, since it uses less digits than its factorization.

6446969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280326.

The product of its digits is 279936, while the sum is 44.

The square root of 6446969 is about 2539.0882221774. The cubic root of 6446969 is about 186.1166359061.

The spelling of 6446969 in words is "six million, four hundred forty-six thousand, nine hundred sixty-nine".