145523069 has 2 divisors, whose sum is σ = 145523070. Its totient is φ = 145523068.

The previous prime is 145523041. The next prime is 145523149. The reversal of 145523069 is 960325541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80317444 + 65205625 = 8962^2 + 8075^2 .

It is a cyclic number.

It is not a de Polignac number, because 145523069 - 2²⁰ = 144474493 is a prime.

It is a super-2 number, since 2×145523069² = 42353927222357522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145523029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72761534 + 72761535.

It is an arithmetic number, because the mean of its divisors is an integer number (72761535).

Almost surely, 2^145523069 is an apocalyptic number.

It is an amenable number.

145523069 is a deficient number, since it is larger than the sum of its proper divisors (1).

145523069 is an equidigital number, since it uses as much as digits as its factorization.

145523069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 145523069 is about 12063.2942847300. The cubic root of 145523069 is about 525.9897507485.

The spelling of 145523069 in words is "one hundred forty-five million, five hundred twenty-three thousand, sixty-nine".