723949 has 2 divisors, whose sum is σ = 723950. Its totient is φ = 723948.

The previous prime is 723923. The next prime is 723959. The reversal of 723949 is 949327.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 455625 + 268324 = 675^2 + 518^2 .

It is a cyclic number.

It is not a de Polignac number, because 723949 - 2⁵ = 723917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (723959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361974 + 361975.

It is an arithmetic number, because the mean of its divisors is an integer number (361975).

2⁷²³⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

723949 is a deficient number, since it is larger than the sum of its proper divisors (1).

723949 is an equidigital number, since it uses as much as digits as its factorization.

723949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 34.

The square root of 723949 is about 850.8519260130. The cubic root of 723949 is about 89.7916579966.

The spelling of 723949 in words is "seven hundred twenty-three thousand, nine hundred forty-nine".