423949 has 2 divisors, whose sum is σ = 423950. Its totient is φ = 423948.

The previous prime is 423931. The next prime is 423961. The reversal of 423949 is 949324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 381924 + 42025 = 618^2 + 205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 423949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211974 + 211975.

It is an arithmetic number, because the mean of its divisors is an integer number (211975).

2⁴²³⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

423949 is a deficient number, since it is larger than the sum of its proper divisors (1).

423949 is an equidigital number, since it uses as much as digits as its factorization.

423949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 31.

The square root of 423949 is about 651.1136613526. The cubic root of 423949 is about 75.1227028477.

The spelling of 423949 in words is "four hundred twenty-three thousand, nine hundred forty-nine".