105142541989 has 2 divisors, whose sum is σ = 105142541990. Its totient is φ = 105142541988.

The previous prime is 105142541971. The next prime is 105142542031. The reversal of 105142541989 is 989145241501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100961885025 + 4180656964 = 317745^2 + 64658^2 .

It is an emirp because it is prime and its reverse (989145241501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 105142541989 - 2²⁹ = 104605671077 is a prime.

It is a super-2 number, since 2×105142541989² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105142541089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52571270994 + 52571270995.

It is an arithmetic number, because the mean of its divisors is an integer number (52571270995).

Almost surely, 2^105142541989 is an apocalyptic number.

It is an amenable number.

105142541989 is a deficient number, since it is larger than the sum of its proper divisors (1).

105142541989 is an equidigital number, since it uses as much as digits as its factorization.

105142541989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518400, while the sum is 49.

The spelling of 105142541989 in words is "one hundred five billion, one hundred forty-two million, five hundred forty-one thousand, nine hundred eighty-nine".