145556393 has 2 divisors, whose sum is σ = 145556394. Its totient is φ = 145556392.

The previous prime is 145556381. The next prime is 145556417. The reversal of 145556393 is 393655541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136235584 + 9320809 = 11672^2 + 3053^2 .

It is a cyclic number.

It is not a de Polignac number, because 145556393 - 2⁸ = 145556137 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145556393.

It is not a weakly prime, because it can be changed into another prime (145556303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72778196 + 72778197.

It is an arithmetic number, because the mean of its divisors is an integer number (72778197).

Almost surely, 2^145556393 is an apocalyptic number.

It is an amenable number.

145556393 is a deficient number, since it is larger than the sum of its proper divisors (1).

145556393 is an equidigital number, since it uses as much as digits as its factorization.

145556393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 243000, while the sum is 41.

The square root of 145556393 is about 12064.6754204164. The cubic root of 145556393 is about 526.0298972920.

The spelling of 145556393 in words is "one hundred forty-five million, five hundred fifty-six thousand, three hundred ninety-three".