2750221979 has 2 divisors, whose sum is σ = 2750221980. Its totient is φ = 2750221978.

The previous prime is 2750221973. The next prime is 2750221997. The reversal of 2750221979 is 9791220572.

Together with next prime (2750221997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2750221979 - 2⁸ = 2750221723 is a prime.

It is not a weakly prime, because it can be changed into another prime (2750221973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1375110989 + 1375110990.

It is an arithmetic number, because the mean of its divisors is an integer number (1375110990).

Almost surely, 2^2750221979 is an apocalyptic number.

2750221979 is a deficient number, since it is larger than the sum of its proper divisors (1).

2750221979 is an equidigital number, since it uses as much as digits as its factorization.

2750221979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 158760, while the sum is 44.

The square root of 2750221979 is about 52442.5588525198. The cubic root of 2750221979 is about 1401.0573609128.

The spelling of 2750221979 in words is "two billion, seven hundred fifty million, two hundred twenty-one thousand, nine hundred seventy-nine".