6376447421 has 4 divisors (see below), whose sum is σ = 6390101952. Its totient is φ = 6362792892.

The previous prime is 6376447417. The next prime is 6376447457. The reversal of 6376447421 is 1247446736.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6376447421 - 2² = 6376447417 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 (6376447621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6826565 + ... + 6827498.

It is an arithmetic number, because the mean of its divisors is an integer number (1597525488).

Almost surely, 2^6376447421 is an apocalyptic number.

It is an amenable number.

6376447421 is a deficient number, since it is larger than the sum of its proper divisors (13654531).

6376447421 is a wasteful number, since it uses less digits than its factorization.

6376447421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13654530.

The product of its digits is 677376, while the sum is 44.

The square root of 6376447421 is about 79852.6607008182. The cubic root of 6376447421 is about 1854.3552049714.

The spelling of 6376447421 in words is "six billion, three hundred seventy-six million, four hundred forty-seven thousand, four hundred twenty-one".