626331421 has 4 divisors (see below), whose sum is σ = 640897312. Its totient is φ = 611765532.

The previous prime is 626331413. The next prime is 626331427. The reversal of 626331421 is 124133626.

626331421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 626331421 - 2³ = 626331413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 626331421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (626331427) 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, 7282881 + ... + 7282966.

It is an arithmetic number, because the mean of its divisors is an integer number (160224328).

Almost surely, 2^626331421 is an apocalyptic number.

It is an amenable number.

626331421 is a deficient number, since it is larger than the sum of its proper divisors (14565891).

626331421 is a wasteful number, since it uses less digits than its factorization.

626331421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14565890.

The product of its digits is 5184, while the sum is 28.

The square root of 626331421 is about 25026.6142536301. The cubic root of 626331421 is about 855.5946621736.

The spelling of 626331421 in words is "six hundred twenty-six million, three hundred thirty-one thousand, four hundred twenty-one".