145556447 has 2 divisors, whose sum is σ = 145556448. Its totient is φ = 145556446.

The previous prime is 145556441. The next prime is 145556479. The reversal of 145556447 is 744655541.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145556447 - 2²⁶ = 78447583 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 (145556441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72778223 + 72778224.

It is an arithmetic number, because the mean of its divisors is an integer number (72778224).

Almost surely, 2^145556447 is an apocalyptic number.

145556447 is a deficient number, since it is larger than the sum of its proper divisors (1).

145556447 is an equidigital number, since it uses as much as digits as its factorization.

145556447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336000, while the sum is 41.

The square root of 145556447 is about 12064.6776583546. The cubic root of 145556447 is about 526.0299623426.

The spelling of 145556447 in words is "one hundred forty-five million, five hundred fifty-six thousand, four hundred forty-seven".