1081973670389 has 2 divisors, whose sum is σ = 1081973670390. Its totient is φ = 1081973670388.

The previous prime is 1081973670367. The next prime is 1081973670409. The reversal of 1081973670389 is 9830763791801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1063651882225 + 18321788164 = 1031335^2 + 135358^2 .

It is a cyclic number.

It is not a de Polignac number, because 1081973670389 - 2²⁰ = 1081972621813 is a prime.

It is a super-2 number, since 2×1081973670389² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1081973670359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540986835194 + 540986835195.

It is an arithmetic number, because the mean of its divisors is an integer number (540986835195).

Almost surely, 2^{1081973670389} is an apocalyptic number.

It is an amenable number.

1081973670389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081973670389 is an equidigital number, since it uses as much as digits as its factorization.

1081973670389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13716864, while the sum is 62.

The spelling of 1081973670389 in words is "one trillion, eighty-one billion, nine hundred seventy-three million, six hundred seventy thousand, three hundred eighty-nine".