145744439 has 2 divisors, whose sum is σ = 145744440. Its totient is φ = 145744438.

The previous prime is 145744429. The next prime is 145744447. The reversal of 145744439 is 934447541.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145744439 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 145744396 and 145744405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145744409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72872219 + 72872220.

It is an arithmetic number, because the mean of its divisors is an integer number (72872220).

Almost surely, 2^145744439 is an apocalyptic number.

145744439 is a deficient number, since it is larger than the sum of its proper divisors (1).

145744439 is an equidigital number, since it uses as much as digits as its factorization.

145744439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 41.

The square root of 145744439 is about 12072.4661523651. The cubic root of 145744439 is about 526.2563278616.

The spelling of 145744439 in words is "one hundred forty-five million, seven hundred forty-four thousand, four hundred thirty-nine".