1980081297 has 6 divisors (see below), whose sum is σ = 2860117442. Its totient is φ = 1320054192.

The previous prime is 1980081287. The next prime is 1980081319. The reversal of 1980081297 is 7921800891.

It can be written as a sum of positive squares in only one way, i.e., 1035809856 + 944271441 = 32184^2 + 30729^2 .

It is not a de Polignac number, because 1980081297 - 2⁸ = 1980081041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1980081287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 110004508 + ... + 110004525.

Almost surely, 2^1980081297 is an apocalyptic number.

It is an amenable number.

1980081297 is a deficient number, since it is larger than the sum of its proper divisors (880036145).

1980081297 is a wasteful number, since it uses less digits than its factorization.

1980081297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220009039 (or 220009036 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 45.

The square root of 1980081297 is about 44498.1044203009. The cubic root of 1980081297 is about 1255.7244214745.

The spelling of 1980081297 in words is "one billion, nine hundred eighty million, eighty-one thousand, two hundred ninety-seven".