242179919 has 2 divisors, whose sum is σ = 242179920. Its totient is φ = 242179918.

The previous prime is 242179901. The next prime is 242179933. The reversal of 242179919 is 919971242.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242179919 is a prime.

It is a super-2 number, since 2×242179919² = 117302226333693122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 242179919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242179979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121089959 + 121089960.

It is an arithmetic number, because the mean of its divisors is an integer number (121089960).

Almost surely, 2^242179919 is an apocalyptic number.

242179919 is a deficient number, since it is larger than the sum of its proper divisors (1).

242179919 is an equidigital number, since it uses as much as digits as its factorization.

242179919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 44.

The square root of 242179919 is about 15562.1309273505. The cubic root of 242179919 is about 623.3223651083.

The spelling of 242179919 in words is "two hundred forty-two million, one hundred seventy-nine thousand, nine hundred nineteen".