145121532973 has 2 divisors, whose sum is σ = 145121532974. Its totient is φ = 145121532972.

The previous prime is 145121532967. The next prime is 145121532979. The reversal of 145121532973 is 379235121541.

It is a balanced prime because it is at equal distance from previous prime (145121532967) and next prime (145121532979).

It can be written as a sum of positive squares in only one way, i.e., 140818566564 + 4302966409 = 375258^2 + 65597^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145121532973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145121532979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72560766486 + 72560766487.

It is an arithmetic number, because the mean of its divisors is an integer number (72560766487).

Almost surely, 2^145121532973 is an apocalyptic number.

It is an amenable number.

145121532973 is a deficient number, since it is larger than the sum of its proper divisors (1).

145121532973 is an equidigital number, since it uses as much as digits as its factorization.

145121532973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226800, while the sum is 43.

The spelling of 145121532973 in words is "one hundred forty-five billion, one hundred twenty-one million, five hundred thirty-two thousand, nine hundred seventy-three".