1029440378677 has 2 divisors, whose sum is σ = 1029440378678. Its totient is φ = 1029440378676.

The previous prime is 1029440378569. The next prime is 1029440378699. The reversal of 1029440378677 is 7768730449201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 569744174596 + 459696204081 = 754814^2 + 678009^2 .

It is a cyclic number.

It is not a de Polignac number, because 1029440378677 - 2¹⁹ = 1029439854389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1029440378777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 514720189338 + 514720189339.

It is an arithmetic number, because the mean of its divisors is an integer number (514720189339).

Almost surely, 2^{1029440378677} is an apocalyptic number.

It is an amenable number.

1029440378677 is a deficient number, since it is larger than the sum of its proper divisors (1).

1029440378677 is an equidigital number, since it uses as much as digits as its factorization.

1029440378677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14224896, while the sum is 58.

The spelling of 1029440378677 in words is "one trillion, twenty-nine billion, four hundred forty million, three hundred seventy-eight thousand, six hundred seventy-seven".