145273439 has 2 divisors, whose sum is σ = 145273440. Its totient is φ = 145273438.

The previous prime is 145273423. The next prime is 145273519. The reversal of 145273439 is 934372541.

145273439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (934372541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145273439 - 2⁴ = 145273423 is a prime.

It is a super-2 number, since 2×145273439² = 42208744157773442, which contains 22 as substring.

It is equal to p_8193098 and since 145273439 and 8193098 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145273339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72636719 + 72636720.

It is an arithmetic number, because the mean of its divisors is an integer number (72636720).

Almost surely, 2^145273439 is an apocalyptic number.

145273439 is a deficient number, since it is larger than the sum of its proper divisors (1).

145273439 is an equidigital number, since it uses as much as digits as its factorization.

145273439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 38.

The square root of 145273439 is about 12052.9431675421. The cubic root of 145273439 is about 525.6888179986.

The spelling of 145273439 in words is "one hundred forty-five million, two hundred seventy-three thousand, four hundred thirty-nine".