242440039 has 2 divisors, whose sum is σ = 242440040. Its totient is φ = 242440038.

The previous prime is 242439991. The next prime is 242440069. The reversal of 242440039 is 930044242.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 242440039 - 2²⁷ = 108222311 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 242439989 and 242440016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242440069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121220019 + 121220020.

It is an arithmetic number, because the mean of its divisors is an integer number (121220020).

Almost surely, 2^242440039 is an apocalyptic number.

242440039 is a deficient number, since it is larger than the sum of its proper divisors (1).

242440039 is an equidigital number, since it uses as much as digits as its factorization.

242440039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 242440039 is about 15570.4861516910. The cubic root of 242440039 is about 623.5454507645.

The spelling of 242440039 in words is "two hundred forty-two million, four hundred forty thousand, thirty-nine".