145616389 has 2 divisors, whose sum is σ = 145616390. Its totient is φ = 145616388.

The previous prime is 145616357. The next prime is 145616417. The reversal of 145616389 is 983616541.

145616389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117896164 + 27720225 = 10858^2 + 5265^2 .

It is a cyclic number.

It is not a de Polignac number, because 145616389 - 2⁵ = 145616357 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145616309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72808194 + 72808195.

It is an arithmetic number, because the mean of its divisors is an integer number (72808195).

Almost surely, 2^145616389 is an apocalyptic number.

It is an amenable number.

145616389 is a deficient number, since it is larger than the sum of its proper divisors (1).

145616389 is an equidigital number, since it uses as much as digits as its factorization.

145616389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 43.

The square root of 145616389 is about 12067.1615966639. The cubic root of 145616389 is about 526.1021610470.

The spelling of 145616389 in words is "one hundred forty-five million, six hundred sixteen thousand, three hundred eighty-nine".