723031 has 2 divisors, whose sum is σ = 723032. Its totient is φ = 723030.

The previous prime is 723029. The next prime is 723043. The reversal of 723031 is 130327.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 723031 - 2¹ = 723029 is a prime.

It is a super-2 number, since 2×723031² = 1045547653922, which contains 22 as substring.

Together with 723029, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 722996 and 723014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (723071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361515 + 361516.

It is an arithmetic number, because the mean of its divisors is an integer number (361516).

2⁷²³⁰³¹ is an apocalyptic number.

723031 is a deficient number, since it is larger than the sum of its proper divisors (1).

723031 is an equidigital number, since it uses as much as digits as its factorization.

723031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126, while the sum is 16.

The square root of 723031 is about 850.3122955715. The cubic root of 723031 is about 89.7536886518.

Adding to 723031 its reverse (130327), we get a palindrome (853358).

Subtracting from 723031 its reverse (130327), we obtain a cube (592704 = 84³).

The spelling of 723031 in words is "seven hundred twenty-three thousand, thirty-one".