371821947779 has 2 divisors, whose sum is σ = 371821947780. Its totient is φ = 371821947778.

The previous prime is 371821947727. The next prime is 371821947839. The reversal of 371821947779 is 977749128173.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-371821947779 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (371821947719) 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, 185910973889 + 185910973890.

It is an arithmetic number, because the mean of its divisors is an integer number (185910973890).

Almost surely, 2^371821947779 is an apocalyptic number.

371821947779 is a deficient number, since it is larger than the sum of its proper divisors (1).

371821947779 is an equidigital number, since it uses as much as digits as its factorization.

371821947779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37340352, while the sum is 65.

The spelling of 371821947779 in words is "three hundred seventy-one billion, eight hundred twenty-one million, nine hundred forty-seven thousand, seven hundred seventy-nine".