2421878969 has 2 divisors, whose sum is σ = 2421878970. Its totient is φ = 2421878968.

The previous prime is 2421878959. The next prime is 2421879071. The reversal of 2421878969 is 9698781242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2250268969 + 171610000 = 47437^2 + 13100^2 .

It is a cyclic number.

It is not a de Polignac number, because 2421878969 - 2²⁴ = 2405101753 is a prime.

It is a super-2 number, since 2×2421878969² = 11730995480969005922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2421878959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1210939484 + 1210939485.

It is an arithmetic number, because the mean of its divisors is an integer number (1210939485).

Almost surely, 2^2421878969 is an apocalyptic number.

It is an amenable number.

2421878969 is a deficient number, since it is larger than the sum of its proper divisors (1).

2421878969 is an equidigital number, since it uses as much as digits as its factorization.

2421878969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3483648, while the sum is 56.

The square root of 2421878969 is about 49212.5895376376. The cubic root of 2421878969 is about 1342.9220723347.

The spelling of 2421878969 in words is "two billion, four hundred twenty-one million, eight hundred seventy-eight thousand, nine hundred sixty-nine".