145404439 has 2 divisors, whose sum is σ = 145404440. Its totient is φ = 145404438.

The previous prime is 145404437. The next prime is 145404443. The reversal of 145404439 is 934404541.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145404439 - 2¹ = 145404437 is a prime.

It is a super-2 number, since 2×145404439² = 42284901761809442, which contains 22 as substring.

Together with 145404437, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145404433) 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, 72702219 + 72702220.

It is an arithmetic number, because the mean of its divisors is an integer number (72702220).

Almost surely, 2^145404439 is an apocalyptic number.

145404439 is a deficient number, since it is larger than the sum of its proper divisors (1).

145404439 is an equidigital number, since it uses as much as digits as its factorization.

145404439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 145404439 is about 12058.3763003151. The cubic root of 145404439 is about 525.8467834333.

The spelling of 145404439 in words is "one hundred forty-five million, four hundred four thousand, four hundred thirty-nine".