163780139 has 4 divisors (see below), whose sum is σ = 169427760. Its totient is φ = 158132520.

The previous prime is 163780103. The next prime is 163780151. The reversal of 163780139 is 931087361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931087361 = 1499 ⋅621139.

It is a cyclic number.

It is not a de Polignac number, because 163780139 - 2²⁴ = 147002923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163780039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2823767 + ... + 2823824.

It is an arithmetic number, because the mean of its divisors is an integer number (42356940).

Almost surely, 2^163780139 is an apocalyptic number.

163780139 is a deficient number, since it is larger than the sum of its proper divisors (5647621).

163780139 is an equidigital number, since it uses as much as digits as its factorization.

163780139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5647620.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 163780139 is about 12797.6614660648. The cubic root of 163780139 is about 547.1256536273.

The spelling of 163780139 in words is "one hundred sixty-three million, seven hundred eighty thousand, one hundred thirty-nine".