163245139 has 2 divisors, whose sum is σ = 163245140. Its totient is φ = 163245138.

The previous prime is 163245133. The next prime is 163245193. The reversal of 163245139 is 931542361.

Together with next prime (163245193) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 163245139 - 2⁵ = 163245107 is a prime.

It is not a weakly prime, because it can be changed into another prime (163245133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81622569 + 81622570.

It is an arithmetic number, because the mean of its divisors is an integer number (81622570).

Almost surely, 2^163245139 is an apocalyptic number.

163245139 is a deficient number, since it is larger than the sum of its proper divisors (1).

163245139 is an equidigital number, since it uses as much as digits as its factorization.

163245139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 34.

The square root of 163245139 is about 12776.7421121348. The cubic root of 163245139 is about 546.5292615613.

The spelling of 163245139 in words is "one hundred sixty-three million, two hundred forty-five thousand, one hundred thirty-nine".