423597949 has 2 divisors, whose sum is σ = 423597950. Its totient is φ = 423597948.

The previous prime is 423597947. The next prime is 423597953. The reversal of 423597949 is 949795324.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 230888025 + 192709924 = 15195^2 + 13882^2 .

It is a cyclic number.

It is not a de Polignac number, because 423597949 - 2¹ = 423597947 is a prime.

Together with 423597947, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 423597896 and 423597905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423597947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211798974 + 211798975.

It is an arithmetic number, because the mean of its divisors is an integer number (211798975).

Almost surely, 2^423597949 is an apocalyptic number.

It is an amenable number.

423597949 is a deficient number, since it is larger than the sum of its proper divisors (1).

423597949 is an equidigital number, since it uses as much as digits as its factorization.

423597949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 52.

The square root of 423597949 is about 20581.4953052493. The cubic root of 423597949 is about 751.0196200200.

The spelling of 423597949 in words is "four hundred twenty-three million, five hundred ninety-seven thousand, nine hundred forty-nine".