723491 has 2 divisors, whose sum is σ = 723492. Its totient is φ = 723490.

The previous prime is 723479. The next prime is 723493. The reversal of 723491 is 194327.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 723491 - 2¹⁰ = 722467 is a prime.

Together with 723493, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 723491.

It is not a weakly prime, because it can be changed into another prime (723493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361745 + 361746.

It is an arithmetic number, because the mean of its divisors is an integer number (361746).

2⁷²³⁴⁹¹ is an apocalyptic number.

723491 is a deficient number, since it is larger than the sum of its proper divisors (1).

723491 is an equidigital number, since it uses as much as digits as its factorization.

723491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 26.

The square root of 723491 is about 850.5827414191. The cubic root of 723491 is about 89.7727186999.

The spelling of 723491 in words is "seven hundred twenty-three thousand, four hundred ninety-one".