145523449 has 2 divisors, whose sum is σ = 145523450. Its totient is φ = 145523448.

The previous prime is 145523429. The next prime is 145523453. The reversal of 145523449 is 944325541.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98010000 + 47513449 = 9900^2 + 6893^2 .

It is a cyclic number.

It is not a de Polignac number, because 145523449 - 2²⁵ = 111969017 is a prime.

It is not a weakly prime, because it can be changed into another prime (145523429) 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, 72761724 + 72761725.

It is an arithmetic number, because the mean of its divisors is an integer number (72761725).

Almost surely, 2^145523449 is an apocalyptic number.

It is an amenable number.

145523449 is a deficient number, since it is larger than the sum of its proper divisors (1).

145523449 is an equidigital number, since it uses as much as digits as its factorization.

145523449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 37.

The square root of 145523449 is about 12063.3100349780. The cubic root of 145523449 is about 525.9902085818.

The spelling of 145523449 in words is "one hundred forty-five million, five hundred twenty-three thousand, four hundred forty-nine".