622979 has 4 divisors (see below), whose sum is σ = 711984. Its totient is φ = 533976.

The previous prime is 622967. The next prime is 622987. The reversal of 622979 is 979226.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 979226 = 2 ⋅489613.

It is a cyclic number.

It is not a de Polignac number, because 622979 - 2⁸ = 622723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (622879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44492 + ... + 44505.

It is an arithmetic number, because the mean of its divisors is an integer number (177996).

2⁶²²⁹⁷⁹ is an apocalyptic number.

622979 is a deficient number, since it is larger than the sum of its proper divisors (89005).

622979 is an equidigital number, since it uses as much as digits as its factorization.

622979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89004.

The product of its digits is 13608, while the sum is 35.

The square root of 622979 is about 789.2901874469. The cubic root of 622979 is about 85.4065415191.

The spelling of 622979 in words is "six hundred twenty-two thousand, nine hundred seventy-nine".