6442949 has 4 divisors (see below), whose sum is σ = 6821964. Its totient is φ = 6063936.

The previous prime is 6442939. The next prime is 6442979. The reversal of 6442949 is 9492446.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2502724 + 3940225 = 1582^2 + 1985^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6442949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6442939) 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, 189482 + ... + 189515.

It is an arithmetic number, because the mean of its divisors is an integer number (1705491).

Almost surely, 2^6442949 is an apocalyptic number.

It is an amenable number.

6442949 is a deficient number, since it is larger than the sum of its proper divisors (379015).

6442949 is a wasteful number, since it uses less digits than its factorization.

6442949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379014.

The product of its digits is 62208, while the sum is 38.

The square root of 6442949 is about 2538.2964759854. The cubic root of 6442949 is about 186.0779435924.

The spelling of 6442949 in words is "six million, four hundred forty-two thousand, nine hundred forty-nine".