145689539 has 2 divisors, whose sum is σ = 145689540. Its totient is φ = 145689538.

The previous prime is 145689493. The next prime is 145689559. The reversal of 145689539 is 935986541.

It is a happy number.

145689539 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145689539 is a prime.

It is not a weakly prime, because it can be changed into another prime (145689559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72844769 + 72844770.

It is an arithmetic number, because the mean of its divisors is an integer number (72844770).

Almost surely, 2^145689539 is an apocalyptic number.

145689539 is a deficient number, since it is larger than the sum of its proper divisors (1).

145689539 is an equidigital number, since it uses as much as digits as its factorization.

145689539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1166400, while the sum is 50.

The square root of 145689539 is about 12070.1921691413. The cubic root of 145689539 is about 526.1902416332.

The spelling of 145689539 in words is "one hundred forty-five million, six hundred eighty-nine thousand, five hundred thirty-nine".