1976655049 has 2 divisors, whose sum is σ = 1976655050. Its totient is φ = 1976655048.

The previous prime is 1976655047. The next prime is 1976655073. The reversal of 1976655049 is 9405566791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1879829449 + 96825600 = 43357^2 + 9840^2 .

It is a cyclic number.

It is not a de Polignac number, because 1976655049 - 2¹ = 1976655047 is a prime.

Together with 1976655047, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1976654987 and 1976655005.

It is not a weakly prime, because it can be changed into another prime (1976655047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 988327524 + 988327525.

It is an arithmetic number, because the mean of its divisors is an integer number (988327525).

Almost surely, 2^1976655049 is an apocalyptic number.

It is an amenable number.

1976655049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1976655049 is an equidigital number, since it uses as much as digits as its factorization.

1976655049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2041200, while the sum is 52.

The square root of 1976655049 is about 44459.5889432190. The cubic root of 1976655049 is about 1254.9997193695. Note that the first 3 decimals are identical.

The spelling of 1976655049 in words is "one billion, nine hundred seventy-six million, six hundred fifty-five thousand, forty-nine".