1223679 has 4 divisors (see below), whose sum is σ = 1631576. Its totient is φ = 815784.

The previous prime is 1223633. The next prime is 1223683. The reversal of 1223679 is 9763221.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1223679 - 2¹¹ = 1221631 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 10 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223689) 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, 203944 + ... + 203949.

It is an arithmetic number, because the mean of its divisors is an integer number (407894).

2^1223679 is an apocalyptic number.

1223679 is a deficient number, since it is larger than the sum of its proper divisors (407897).

1223679 is an equidigital number, since it uses as much as digits as its factorization.

1223679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407896.

The product of its digits is 4536, while the sum is 30.

The square root of 1223679 is about 1106.2002531188. The cubic root of 1223679 is about 106.9602729044.

The spelling of 1223679 in words is "one million, two hundred twenty-three thousand, six hundred seventy-nine".