2979997625281 has 2 divisors, whose sum is σ = 2979997625282. Its totient is φ = 2979997625280.

The previous prime is 2979997625279. The next prime is 2979997625323. The reversal of 2979997625281 is 1825267999792.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2136832927681 + 843164697600 = 1461791^2 + 918240^2 .

It is a cyclic number.

It is not a de Polignac number, because 2979997625281 - 2¹ = 2979997625279 is a prime.

It is a super-2 number, since 2×2979997625281² (a number of 26 digits) contains 22 as substring.

Together with 2979997625279, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2979997625198 and 2979997625207.

It is not a weakly prime, because it can be changed into another prime (2979997625251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1489998812640 + 1489998812641.

It is an arithmetic number, because the mean of its divisors is an integer number (1489998812641).

Almost surely, 2^{2979997625281} is an apocalyptic number.

It is an amenable number.

2979997625281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2979997625281 is an equidigital number, since it uses as much as digits as its factorization.

2979997625281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 617258880, while the sum is 76.

The spelling of 2979997625281 in words is "two trillion, nine hundred seventy-nine billion, nine hundred ninety-seven million, six hundred twenty-five thousand, two hundred eighty-one".