6904212421 has 4 divisors (see below), whose sum is σ = 6906003552. Its totient is φ = 6902421292.

The previous prime is 6904212331. The next prime is 6904212437. The reversal of 6904212421 is 1242124096.

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 6904212421 - 2¹¹ = 6904210373 is a prime.

It is a super-3 number, since 3×6904212421³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6904212121) 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, 889771 + ... + 897496.

It is an arithmetic number, because the mean of its divisors is an integer number (1726500888).

Almost surely, 2^6904212421 is an apocalyptic number.

It is an amenable number.

6904212421 is a deficient number, since it is larger than the sum of its proper divisors (1791131).

6904212421 is a wasteful number, since it uses less digits than its factorization.

6904212421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1791130.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 6904212421 is about 83091.5905552421. The cubic root of 6904212421 is about 1904.1655993606.

The spelling of 6904212421 in words is "six billion, nine hundred four million, two hundred twelve thousand, four hundred twenty-one".