6429749 has 4 divisors (see below), whose sum is σ = 6603564. Its totient is φ = 6255936.

The previous prime is 6429739. The next prime is 6429763. The reversal of 6429749 is 9479246.

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 2951524 + 3478225 = 1718^2 + 1865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6429749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6429739) 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, 86852 + ... + 86925.

It is an arithmetic number, because the mean of its divisors is an integer number (1650891).

Almost surely, 2^6429749 is an apocalyptic number.

It is an amenable number.

6429749 is a deficient number, since it is larger than the sum of its proper divisors (173815).

6429749 is a wasteful number, since it uses less digits than its factorization.

6429749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173814.

The product of its digits is 108864, while the sum is 41.

The square root of 6429749 is about 2535.6949737695. The cubic root of 6429749 is about 185.9507809029.

It can be divided in two parts, 64297 and 49, that added together give a palindrome (64346).

The spelling of 6429749 in words is "six million, four hundred twenty-nine thousand, seven hundred forty-nine".