6447955 has 8 divisors (see below), whose sum is σ = 7771104. Its totient is φ = 5136000.

The previous prime is 6447943. The next prime is 6447967. The reversal of 6447955 is 5597446.

It is an interprime number because it is at equal distance from previous prime (6447943) and next prime (6447967).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6447955 - 2⁵ = 6447923 is a prime.

It is a super-2 number, since 2×6447955² = 83152247364050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1471 + ... + 3880.

It is an arithmetic number, because the mean of its divisors is an integer number (971388).

Almost surely, 2^6447955 is an apocalyptic number.

6447955 is a deficient number, since it is larger than the sum of its proper divisors (1323149).

6447955 is a wasteful number, since it uses less digits than its factorization.

6447955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5597.

The product of its digits is 151200, while the sum is 40.

The square root of 6447955 is about 2539.2823789409. The cubic root of 6447955 is about 186.1261236539.

The spelling of 6447955 in words is "six million, four hundred forty-seven thousand, nine hundred fifty-five".