145121532989 has 2 divisors, whose sum is σ = 145121532990. Its totient is φ = 145121532988.

The previous prime is 145121532979. The next prime is 145121533003. The reversal of 145121532989 is 989235121541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81890407225 + 63231125764 = 286165^2 + 251458^2 .

It is an emirp because it is prime and its reverse (989235121541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145121532989 - 2⁴ = 145121532973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145121532929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72560766494 + 72560766495.

It is an arithmetic number, because the mean of its divisors is an integer number (72560766495).

Almost surely, 2^145121532989 is an apocalyptic number.

It is an amenable number.

145121532989 is a deficient number, since it is larger than the sum of its proper divisors (1).

145121532989 is an equidigital number, since it uses as much as digits as its factorization.

145121532989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 777600, while the sum is 50.

The spelling of 145121532989 in words is "one hundred forty-five billion, one hundred twenty-one million, five hundred thirty-two thousand, nine hundred eighty-nine".