623679 has 16 divisors (see below), whose sum is σ = 1006848. Its totient is φ = 335232.

The previous prime is 623677. The next prime is 623681. The reversal of 623679 is 976326.

623679 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (623677) and next prime (623681).

It is not a de Polignac number, because 623679 - 2¹ = 623677 is a prime.

623679 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 517 + ... + 1230.

It is an arithmetic number, because the mean of its divisors is an integer number (62928).

2⁶²³⁶⁷⁹ is an apocalyptic number.

623679 is a deficient number, since it is larger than the sum of its proper divisors (383169).

623679 is a wasteful number, since it uses less digits than its factorization.

623679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1774.

The product of its digits is 13608, while the sum is 33.

The square root of 623679 is about 789.7334993528. The cubic root of 623679 is about 85.4385180925.

It can be divided in two parts, 62 and 3679, that added together give a triangular number (3741 = T₈₆).

The spelling of 623679 in words is "six hundred twenty-three thousand, six hundred seventy-nine".