2449984921 has 2 divisors, whose sum is σ = 2449984922. Its totient is φ = 2449984920.

The previous prime is 2449984919. The next prime is 2449984987. The reversal of 2449984921 is 1294899442.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1557170521 + 892814400 = 39461^2 + 29880^2 .

It is a cyclic number.

It is not a de Polignac number, because 2449984921 - 2¹ = 2449984919 is a prime.

It is a super-2 number, since 2×2449984921² = 12004852226254752482, which contains 22 as substring.

Together with 2449984919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2449984991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1224992460 + 1224992461.

It is an arithmetic number, because the mean of its divisors is an integer number (1224992461).

Almost surely, 2^2449984921 is an apocalyptic number.

It is an amenable number.

2449984921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2449984921 is an equidigital number, since it uses as much as digits as its factorization.

2449984921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1492992, while the sum is 52.

The square root of 2449984921 is about 49497.3223619218. The cubic root of 2449984921 is about 1348.0969841685.

The spelling of 2449984921 in words is "two billion, four hundred forty-nine million, nine hundred eighty-four thousand, nine hundred twenty-one".