145220329 has 2 divisors, whose sum is σ = 145220330. Its totient is φ = 145220328.

The previous prime is 145220269. The next prime is 145220333. The reversal of 145220329 is 923022541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82446400 + 62773929 = 9080^2 + 7923^2 .

It is a cyclic number.

It is not a de Polignac number, because 145220329 - 2⁹ = 145219817 is a prime.

It is equal to p_8190235 and since 145220329 and 8190235 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 145220297 and 145220306.

It is not a weakly prime, because it can be changed into another prime (145220129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72610164 + 72610165.

It is an arithmetic number, because the mean of its divisors is an integer number (72610165).

Almost surely, 2^145220329 is an apocalyptic number.

It is an amenable number.

145220329 is a deficient number, since it is larger than the sum of its proper divisors (1).

145220329 is an equidigital number, since it uses as much as digits as its factorization.

145220329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 145220329 is about 12050.7397698233. The cubic root of 145220329 is about 525.6247486217.

The spelling of 145220329 in words is "one hundred forty-five million, two hundred twenty thousand, three hundred twenty-nine".