242636819 has 2 divisors, whose sum is σ = 242636820. Its totient is φ = 242636818.

The previous prime is 242636803. The next prime is 242636923. The reversal of 242636819 is 918636242.

242636819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242636819 - 2⁴ = 242636803 is a prime.

It is a super-2 number, since 2×242636819² = 117745251868877522, which contains 22 as substring.

It is equal to p_13298099 and since 242636819 and 13298099 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (242636519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121318409 + 121318410.

It is an arithmetic number, because the mean of its divisors is an integer number (121318410).

Almost surely, 2^242636819 is an apocalyptic number.

242636819 is a deficient number, since it is larger than the sum of its proper divisors (1).

242636819 is an equidigital number, since it uses as much as digits as its factorization.

242636819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 41.

The square root of 242636819 is about 15576.8038762771. The cubic root of 242636819 is about 623.7141084002.

The spelling of 242636819 in words is "two hundred forty-two million, six hundred thirty-six thousand, eight hundred nineteen".