623739 has 8 divisors (see below), whose sum is σ = 835920. Its totient is φ = 413696.

The previous prime is 623729. The next prime is 623743. The reversal of 623739 is 937326.

It is a happy number.

623739 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 623739 - 2⁴ = 623723 is a prime.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (623719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367 + ... + 1175.

It is an arithmetic number, because the mean of its divisors is an integer number (104490).

2⁶²³⁷³⁹ is an apocalyptic number.

623739 is a deficient number, since it is larger than the sum of its proper divisors (212181).

623739 is a wasteful number, since it uses less digits than its factorization.

623739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069.

The product of its digits is 6804, while the sum is 30.

The square root of 623739 is about 789.7714859375. The cubic root of 623739 is about 85.4412578281.

The spelling of 623739 in words is "six hundred twenty-three thousand, seven hundred thirty-nine".