1976831999939 has 2 divisors, whose sum is σ = 1976831999940. Its totient is φ = 1976831999938.

The previous prime is 1976831999917. The next prime is 1976831999957. The reversal of 1976831999939 is 9399991386791.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1976831999939 - 2²⁰ = 1976830951363 is a prime.

It is not a weakly prime, because it can be changed into another prime (1976831099939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 988415999969 + 988415999970.

It is an arithmetic number, because the mean of its divisors is an integer number (988415999970).

Almost surely, 2^{1976831999939} is an apocalyptic number.

1976831999939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1976831999939 is an equidigital number, since it uses as much as digits as its factorization.

1976831999939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1607077584, while the sum is 83.

The spelling of 1976831999939 in words is "one trillion, nine hundred seventy-six billion, eight hundred thirty-one million, nine hundred ninety-nine thousand, nine hundred thirty-nine".