1939800854437 has 2 divisors, whose sum is σ = 1939800854438. Its totient is φ = 1939800854436.

The previous prime is 1939800854393. The next prime is 1939800854449. The reversal of 1939800854437 is 7344580089391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1162157305156 + 777643549281 = 1078034^2 + 881841^2 .

It is a cyclic number.

It is not a de Polignac number, because 1939800854437 - 2¹⁵ = 1939800821669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1939800854137) 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, 969900427218 + 969900427219.

It is an arithmetic number, because the mean of its divisors is an integer number (969900427219).

Almost surely, 2^{1939800854437} is an apocalyptic number.

It is an amenable number.

1939800854437 is a deficient number, since it is larger than the sum of its proper divisors (1).

1939800854437 is an equidigital number, since it uses as much as digits as its factorization.

1939800854437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26127360, while the sum is 61.

The spelling of 1939800854437 in words is "one trillion, nine hundred thirty-nine billion, eight hundred million, eight hundred fifty-four thousand, four hundred thirty-seven".