6430739 has 4 divisors (see below), whose sum is σ = 7349424. Its totient is φ = 5512056.

The previous prime is 6430687. The next prime is 6430747. The reversal of 6430739 is 9370346.

6430739 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6430739 is a prime.

It is a super-2 number, since 2×6430739² = 82708808172242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6430769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 459332 + ... + 459345.

It is an arithmetic number, because the mean of its divisors is an integer number (1837356).

Almost surely, 2^6430739 is an apocalyptic number.

6430739 is a deficient number, since it is larger than the sum of its proper divisors (918685).

6430739 is an equidigital number, since it uses as much as digits as its factorization.

6430739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918684.

The product of its (nonzero) digits is 13608, while the sum is 32.

The square root of 6430739 is about 2535.8901790101. The cubic root of 6430739 is about 185.9603241384.

It can be divided in two parts, 64307 and 39, that added together give a palindrome (64346).

The spelling of 6430739 in words is "six million, four hundred thirty thousand, seven hundred thirty-nine".