243013019 has 2 divisors, whose sum is σ = 243013020. Its totient is φ = 243013018.

The previous prime is 243013013. The next prime is 243013031. The reversal of 243013019 is 910310342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243013019 - 2¹² = 243008923 is a prime.

It is a super-2 number, since 2×243013019² = 118110654806988722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 243012985 and 243013003.

It is not a weakly prime, because it can be changed into another prime (243013013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121506509 + 121506510.

It is an arithmetic number, because the mean of its divisors is an integer number (121506510).

Almost surely, 2^243013019 is an apocalyptic number.

243013019 is a deficient number, since it is larger than the sum of its proper divisors (1).

243013019 is an equidigital number, since it uses as much as digits as its factorization.

243013019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 243013019 is about 15588.8748471466. The cubic root of 243013019 is about 624.0362910010.

The spelling of 243013019 in words is "two hundred forty-three million, thirteen thousand, nineteen".