622968521 has 4 divisors (see below), whose sum is σ = 711964032. Its totient is φ = 533973012.

The previous prime is 622968491. The next prime is 622968527. The reversal of 622968521 is 125869226.

622968521 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 622968521 - 2⁶ = 622968457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (622968527) 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, 44497745 + ... + 44497758.

It is an arithmetic number, because the mean of its divisors is an integer number (177991008).

Almost surely, 2^622968521 is an apocalyptic number.

It is an amenable number.

622968521 is a deficient number, since it is larger than the sum of its proper divisors (88995511).

622968521 is an equidigital number, since it uses as much as digits as its factorization.

622968521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88995510.

The product of its digits is 103680, while the sum is 41.

The square root of 622968521 is about 24959.3373509795. The cubic root of 622968521 is about 854.0606264788.

The spelling of 622968521 in words is "six hundred twenty-two million, nine hundred sixty-eight thousand, five hundred twenty-one".