723121829 has 2 divisors, whose sum is σ = 723121830. Its totient is φ = 723121828.

The previous prime is 723121807. The next prime is 723121831. The reversal of 723121829 is 928121327.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 723072100 + 49729 = 26890^2 + 223^2 .

It is a cyclic number.

It is not a de Polignac number, because 723121829 - 2⁸ = 723121573 is a prime.

Together with 723121831, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (723121849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361560914 + 361560915.

It is an arithmetic number, because the mean of its divisors is an integer number (361560915).

Almost surely, 2^723121829 is an apocalyptic number.

It is an amenable number.

723121829 is a deficient number, since it is larger than the sum of its proper divisors (1).

723121829 is an equidigital number, since it uses as much as digits as its factorization.

723121829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 35.

The square root of 723121829 is about 26890.9246587022. The cubic root of 723121829 is about 897.5744685689.

The spelling of 723121829 in words is "seven hundred twenty-three million, one hundred twenty-one thousand, eight hundred twenty-nine".