242870428819 has 2 divisors, whose sum is σ = 242870428820. Its totient is φ = 242870428818.

The previous prime is 242870428807. The next prime is 242870428883. The reversal of 242870428819 is 918824078242.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242870428819 is a prime.

It is a super-2 number, since 2×242870428819² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 242870428819.

It is not a weakly prime, because it can be changed into another prime (242870458819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121435214409 + 121435214410.

It is an arithmetic number, because the mean of its divisors is an integer number (121435214410).

Almost surely, 2^242870428819 is an apocalyptic number.

242870428819 is a deficient number, since it is larger than the sum of its proper divisors (1).

242870428819 is an equidigital number, since it uses as much as digits as its factorization.

242870428819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4128768, while the sum is 55.

The spelling of 242870428819 in words is "two hundred forty-two billion, eight hundred seventy million, four hundred twenty-eight thousand, eight hundred nineteen".