423784457 has 2 divisors, whose sum is σ = 423784458. Its totient is φ = 423784456.

The previous prime is 423784441. The next prime is 423784463. The reversal of 423784457 is 754487324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 287268601 + 136515856 = 16949^2 + 11684^2 .

It is a cyclic number.

It is not a de Polignac number, because 423784457 - 2⁴ = 423784441 is a prime.

It is not a weakly prime, because it can be changed into another prime (423784057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211892228 + 211892229.

It is an arithmetic number, because the mean of its divisors is an integer number (211892229).

Almost surely, 2^423784457 is an apocalyptic number.

It is an amenable number.

423784457 is a deficient number, since it is larger than the sum of its proper divisors (1).

423784457 is an equidigital number, since it uses as much as digits as its factorization.

423784457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 752640, while the sum is 44.

The square root of 423784457 is about 20586.0257699246. The cubic root of 423784457 is about 751.1298272067.

The spelling of 423784457 in words is "four hundred twenty-three million, seven hundred eighty-four thousand, four hundred fifty-seven".