423539243 has 2 divisors, whose sum is σ = 423539244. Its totient is φ = 423539242.

The previous prime is 423539219. The next prime is 423539261. The reversal of 423539243 is 342935324.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423539243 is a prime.

It is a super-2 number, since 2×423539243² = 358770980722026098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (423539213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211769621 + 211769622.

It is an arithmetic number, because the mean of its divisors is an integer number (211769622).

Almost surely, 2^423539243 is an apocalyptic number.

423539243 is a deficient number, since it is larger than the sum of its proper divisors (1).

423539243 is an equidigital number, since it uses as much as digits as its factorization.

423539243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 35.

The square root of 423539243 is about 20580.0690717986. The cubic root of 423539243 is about 750.9849240740.

The spelling of 423539243 in words is "four hundred twenty-three million, five hundred thirty-nine thousand, two hundred forty-three".