243351439 has 2 divisors, whose sum is σ = 243351440. Its totient is φ = 243351438.

The previous prime is 243351403. The next prime is 243351467. The reversal of 243351439 is 934153342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243351439 - 2²¹ = 241254287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243351469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121675719 + 121675720.

It is an arithmetic number, because the mean of its divisors is an integer number (121675720).

Almost surely, 2^243351439 is an apocalyptic number.

243351439 is a deficient number, since it is larger than the sum of its proper divisors (1).

243351439 is an equidigital number, since it uses as much as digits as its factorization.

243351439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 34.

The square root of 243351439 is about 15599.7256065612. The cubic root of 243351439 is about 624.3258343425.

The spelling of 243351439 in words is "two hundred forty-three million, three hundred fifty-one thousand, four hundred thirty-nine".