6428719907 has 4 divisors (see below), whose sum is σ = 6428880360. Its totient is φ = 6428559456.

The previous prime is 6428719897. The next prime is 6428719909. The reversal of 6428719907 is 7099178246.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6428719907 - 2²² = 6424525603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6428719909) 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, 36008 + ... + 118970.

It is an arithmetic number, because the mean of its divisors is an integer number (1607220090).

Almost surely, 2^6428719907 is an apocalyptic number.

6428719907 is a deficient number, since it is larger than the sum of its proper divisors (160453).

6428719907 is an equidigital number, since it uses as much as digits as its factorization.

6428719907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160452.

The product of its (nonzero) digits is 1524096, while the sum is 53.

The square root of 6428719907 is about 80179.2984940627. The cubic root of 6428719907 is about 1859.4085978693.

The spelling of 6428719907 in words is "six billion, four hundred twenty-eight million, seven hundred nineteen thousand, nine hundred seven".