390723 has 4 divisors (see below), whose sum is σ = 520968. Its totient is φ = 260480.

The previous prime is 390721. The next prime is 390727. The reversal of 390723 is 327093.

390723 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

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 390723 - 2¹ = 390721 is a prime.

It is a D-number.

390723 is strictly pandigital in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 390693 and 390702.

It is not an unprimeable number, because it can be changed into a prime (390721) 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, 65118 + ... + 65123.

It is an arithmetic number, because the mean of its divisors is an integer number (130242).

2³⁹⁰⁷²³ is an apocalyptic number.

390723 is a deficient number, since it is larger than the sum of its proper divisors (130245).

390723 is a wasteful number, since it uses less digits than its factorization.

390723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130244.

The product of its (nonzero) digits is 1134, while the sum is 24.

The square root of 390723 is about 625.0783950834. The cubic root of 390723 is about 73.1065560906.

The spelling of 390723 in words is "three hundred ninety thousand, seven hundred twenty-three".