2677991321 has 2 divisors, whose sum is σ = 2677991322. Its totient is φ = 2677991320.

The previous prime is 2677991299. The next prime is 2677991359. The reversal of 2677991321 is 1231997762.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2441446921 + 236544400 = 49411^2 + 15380^2 .

It is a cyclic number.

It is not a de Polignac number, because 2677991321 - 2⁶ = 2677991257 is a prime.

It is not a weakly prime, because it can be changed into another prime (2677991621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1338995660 + 1338995661.

It is an arithmetic number, because the mean of its divisors is an integer number (1338995661).

Almost surely, 2^2677991321 is an apocalyptic number.

It is an amenable number.

2677991321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2677991321 is an equidigital number, since it uses as much as digits as its factorization.

2677991321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 285768, while the sum is 47.

The square root of 2677991321 is about 51749.3122756235. The cubic root of 2677991321 is about 1388.6827956146.

The spelling of 2677991321 in words is "two billion, six hundred seventy-seven million, nine hundred ninety-one thousand, three hundred twenty-one".