1976626961 has 2 divisors, whose sum is σ = 1976626962. Its totient is φ = 1976626960.

The previous prime is 1976626957. The next prime is 1976626963. The reversal of 1976626961 is 1696266791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1261599361 + 715027600 = 35519^2 + 26740^2 .

It is an emirp because it is prime and its reverse (1696266791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1976626961 - 2² = 1976626957 is a prime.

Together with 1976626963, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1976626963) 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, 988313480 + 988313481.

It is an arithmetic number, because the mean of its divisors is an integer number (988313481).

Almost surely, 2^1976626961 is an apocalyptic number.

It is an amenable number.

1976626961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1976626961 is an equidigital number, since it uses as much as digits as its factorization.

1976626961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1469664, while the sum is 53.

The square root of 1976626961 is about 44459.2730597341. The cubic root of 1976626961 is about 1254.9937748827.

The spelling of 1976626961 in words is "one billion, nine hundred seventy-six million, six hundred twenty-six thousand, nine hundred sixty-one".