6354667421 has 4 divisors (see below), whose sum is σ = 6373866144. Its totient is φ = 6335468700.

The previous prime is 6354667387. The next prime is 6354667433. The reversal of 6354667421 is 1247664536.

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 a de Polignac number, because none of the positive numbers 2^k-6354667421 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 (6354667481) 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, 9598865 + ... + 9599526.

It is an arithmetic number, because the mean of its divisors is an integer number (1593466536).

Almost surely, 2^6354667421 is an apocalyptic number.

It is an amenable number.

6354667421 is a deficient number, since it is larger than the sum of its proper divisors (19198723).

6354667421 is a wasteful number, since it uses less digits than its factorization.

6354667421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19198722.

The product of its digits is 725760, while the sum is 44.

The square root of 6354667421 is about 79716.1678770373. The cubic root of 6354667421 is about 1852.2414925673.

The spelling of 6354667421 in words is "six billion, three hundred fifty-four million, six hundred sixty-seven thousand, four hundred twenty-one".