1000000997977 has 2 divisors, whose sum is σ = 1000000997978. Its totient is φ = 1000000997976.

The previous prime is 1000000997969. The next prime is 1000000998071. The reversal of 1000000997977 is 7797990000001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 634182878736 + 365818119241 = 796356^2 + 604829^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000000997977 - 2³ = 1000000997969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1000000997977.

It is not a weakly prime, because it can be changed into another prime (1000000997927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500000498988 + 500000498989.

It is an arithmetic number, because the mean of its divisors is an integer number (500000498989).

Almost surely, 2^{1000000997977} is an apocalyptic number.

It is an amenable number.

1000000997977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000000997977 is an equidigital number, since it uses as much as digits as its factorization.

1000000997977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 250047, while the sum is 49.

Adding to 1000000997977 its reverse (7797990000001), we get a palindrome (8797990997978).

The spelling of 1000000997977 in words is "one trillion, nine hundred ninety-seven thousand, nine hundred seventy-seven".