1976632813 has 2 divisors, whose sum is σ = 1976632814. Its totient is φ = 1976632812.

The previous prime is 1976632783. The next prime is 1976632831. The reversal of 1976632813 is 3182366791.

1976632813 = 31437² + 31438².

Together with next prime (1976632831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 988347844 + 988284969 = 31438^2 + 31437^2 .

It is a cyclic number.

It is not a de Polignac number, because 1976632813 - 2¹⁷ = 1976501741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1976632883) 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, 988316406 + 988316407.

It is an arithmetic number, because the mean of its divisors is an integer number (988316407).

Almost surely, 2^1976632813 is an apocalyptic number.

1976632813 is the 31438-th centered square number.

It is an amenable number.

1976632813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1976632813 is an equidigital number, since it uses as much as digits as its factorization.

1976632813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 46.

The square root of 1976632813 is about 44459.3388727273. The cubic root of 1976632813 is about 1254.9950133927.

The spelling of 1976632813 in words is "one billion, nine hundred seventy-six million, six hundred thirty-two thousand, eight hundred thirteen".