1001154892189 has 2 divisors, whose sum is σ = 1001154892190. Its totient is φ = 1001154892188.

The previous prime is 1001154892187. The next prime is 1001154892207. The reversal of 1001154892189 is 9812984511001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1000516066564 + 638825625 = 1000258^2 + 25275^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001154892189 - 2¹ = 1001154892187 is a prime.

It is a super-4 number, since 4×1001154892189⁴ (a number of 49 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

Together with 1001154892187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001154892187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500577446094 + 500577446095.

It is an arithmetic number, because the mean of its divisors is an integer number (500577446095).

Almost surely, 2^{1001154892189} is an apocalyptic number.

It is an amenable number.

1001154892189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001154892189 is an equidigital number, since it uses as much as digits as its factorization.

1001154892189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 49.

The spelling of 1001154892189 in words is "one trillion, one billion, one hundred fifty-four million, eight hundred ninety-two thousand, one hundred eighty-nine".