1928098873621 has 2 divisors, whose sum is σ = 1928098873622. Its totient is φ = 1928098873620.

The previous prime is 1928098873559. The next prime is 1928098873637. The reversal of 1928098873621 is 1263788908291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1547797251025 + 380301622596 = 1244105^2 + 616686^2 .

It is a cyclic number.

It is not a de Polignac number, because 1928098873621 - 2³⁷ = 1790659920149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1928078873621) 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, 964049436810 + 964049436811.

It is an arithmetic number, because the mean of its divisors is an integer number (964049436811).

Almost surely, 2^{1928098873621} is an apocalyptic number.

It is an amenable number.

1928098873621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1928098873621 is an equidigital number, since it uses as much as digits as its factorization.

1928098873621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20901888, while the sum is 64.

The spelling of 1928098873621 in words is "one trillion, nine hundred twenty-eight billion, ninety-eight million, eight hundred seventy-three thousand, six hundred twenty-one".