620723 has 4 divisors (see below), whose sum is σ = 623448. Its totient is φ = 618000.

The previous prime is 620717. The next prime is 620731. The reversal of 620723 is 327026.

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

It is a cyclic number.

It is not a de Polignac number, because 620723 - 2⁸ = 620467 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 620695 and 620704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 986 + ... + 1487.

It is an arithmetic number, because the mean of its divisors is an integer number (155862).

2⁶²⁰⁷²³ is an apocalyptic number.

620723 is a deficient number, since it is larger than the sum of its proper divisors (2725).

620723 is a wasteful number, since it uses less digits than its factorization.

620723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2724.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 620723 is about 787.8597590942. The cubic root of 620723 is about 85.3033223052.

Adding to 620723 its reverse (327026), we get a palindrome (947749).

The spelling of 620723 in words is "six hundred twenty thousand, seven hundred twenty-three".