145446239 has 2 divisors, whose sum is σ = 145446240. Its totient is φ = 145446238.

The previous prime is 145446233. The next prime is 145446283. The reversal of 145446239 is 932644541.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145446239 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145446233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72723119 + 72723120.

It is an arithmetic number, because the mean of its divisors is an integer number (72723120).

Almost surely, 2^145446239 is an apocalyptic number.

145446239 is a deficient number, since it is larger than the sum of its proper divisors (1).

145446239 is an equidigital number, since it uses as much as digits as its factorization.

145446239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 38.

The square root of 145446239 is about 12060.1094107807. The cubic root of 145446239 is about 525.8971677034.

The spelling of 145446239 in words is "one hundred forty-five million, four hundred forty-six thousand, two hundred thirty-nine".