1023221977 has 2 divisors, whose sum is σ = 1023221978. Its totient is φ = 1023221976.

The previous prime is 1023221971. The next prime is 1023221987. The reversal of 1023221977 is 7791223201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 607918336 + 415303641 = 24656^2 + 20379^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1023221977 is a prime.

It is not a weakly prime, because it can be changed into another prime (1023221971) 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, 511610988 + 511610989.

It is an arithmetic number, because the mean of its divisors is an integer number (511610989).

Almost surely, 2^1023221977 is an apocalyptic number.

It is an amenable number.

1023221977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023221977 is an equidigital number, since it uses as much as digits as its factorization.

1023221977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 1023221977 is about 31987.8410806356. The cubic root of 1023221977 is about 1007.6815024367.

The spelling of 1023221977 in words is "one billion, twenty-three million, two hundred twenty-one thousand, nine hundred seventy-seven".