423273649 has 2 divisors, whose sum is σ = 423273650. Its totient is φ = 423273648.

The previous prime is 423273629. The next prime is 423273679. The reversal of 423273649 is 946372324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 226713249 + 196560400 = 15057^2 + 14020^2 .

It is a cyclic number.

It is not a de Polignac number, because 423273649 - 2¹³ = 423265457 is a prime.

It is not a weakly prime, because it can be changed into another prime (423273629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211636824 + 211636825.

It is an arithmetic number, because the mean of its divisors is an integer number (211636825).

Almost surely, 2^423273649 is an apocalyptic number.

It is an amenable number.

423273649 is a deficient number, since it is larger than the sum of its proper divisors (1).

423273649 is an equidigital number, since it uses as much as digits as its factorization.

423273649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 40.

The square root of 423273649 is about 20573.6153604562. The cubic root of 423273649 is about 750.8279147769.

The spelling of 423273649 in words is "four hundred twenty-three million, two hundred seventy-three thousand, six hundred forty-nine".