6930620421 has 4 divisors (see below), whose sum is σ = 9240827232. Its totient is φ = 4620413612.

The previous prime is 6930620413. The next prime is 6930620449. The reversal of 6930620421 is 1240260396.

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 6930620421 - 2³ = 6930620413 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6930620471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1155103401 + ... + 1155103406.

It is an arithmetic number, because the mean of its divisors is an integer number (2310206808).

Almost surely, 2^6930620421 is an apocalyptic number.

It is an amenable number.

6930620421 is a deficient number, since it is larger than the sum of its proper divisors (2310206811).

6930620421 is a wasteful number, since it uses less digits than its factorization.

6930620421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2310206810.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 6930620421 is about 83250.3478731471. The cubic root of 6930620421 is about 1906.5902654352.

The spelling of 6930620421 in words is "six billion, nine hundred thirty million, six hundred twenty thousand, four hundred twenty-one".