242569879 has 2 divisors, whose sum is σ = 242569880. Its totient is φ = 242569878.

The previous prime is 242569807. The next prime is 242569883. The reversal of 242569879 is 978965242.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 242569879 - 2¹³ = 242561687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242564879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121284939 + 121284940.

It is an arithmetic number, because the mean of its divisors is an integer number (121284940).

Almost surely, 2^242569879 is an apocalyptic number.

242569879 is a deficient number, since it is larger than the sum of its proper divisors (1).

242569879 is an equidigital number, since it uses as much as digits as its factorization.

242569879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 52.

The square root of 242569879 is about 15574.6550202565. The cubic root of 242569879 is about 623.6567452147.

The spelling of 242569879 in words is "two hundred forty-two million, five hundred sixty-nine thousand, eight hundred seventy-nine".