145135139 has 2 divisors, whose sum is σ = 145135140. Its totient is φ = 145135138.

The previous prime is 145135099. The next prime is 145135157. The reversal of 145135139 is 931531541.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145135139 - 2¹² = 145131043 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145135189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72567569 + 72567570.

It is an arithmetic number, because the mean of its divisors is an integer number (72567570).

Almost surely, 2^145135139 is an apocalyptic number.

145135139 is a deficient number, since it is larger than the sum of its proper divisors (1).

145135139 is an equidigital number, since it uses as much as digits as its factorization.

145135139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8100, while the sum is 32.

The square root of 145135139 is about 12047.2046135193. The cubic root of 145135139 is about 525.5219468274.

The spelling of 145135139 in words is "one hundred forty-five million, one hundred thirty-five thousand, one hundred thirty-nine".