6447892379 has 4 divisors (see below), whose sum is σ = 6827180184. Its totient is φ = 6068604576.

The previous prime is 6447892369. The next prime is 6447892387. The reversal of 6447892379 is 9732987446.

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

It is a cyclic number.

It is not a de Polignac number, because 6447892379 - 2⁸ = 6447892123 is a prime.

It is a super-2 number, since 2×6447892379² = 83150632262332559282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6447892309) 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, 189643877 + ... + 189643910.

It is an arithmetic number, because the mean of its divisors is an integer number (1706795046).

Almost surely, 2^6447892379 is an apocalyptic number.

6447892379 is a deficient number, since it is larger than the sum of its proper divisors (379287805).

6447892379 is a wasteful number, since it uses less digits than its factorization.

6447892379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379287804.

The product of its digits is 18289152, while the sum is 59.

The square root of 6447892379 is about 80298.7694737597. The cubic root of 6447892379 is about 1861.2552111444.

The spelling of 6447892379 in words is "six billion, four hundred forty-seven million, eight hundred ninety-two thousand, three hundred seventy-nine".