162780139 has 2 divisors, whose sum is σ = 162780140. Its totient is φ = 162780138.

The previous prime is 162780133. The next prime is 162780143. The reversal of 162780139 is 931087261.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 162780139 - 2²⁷ = 28562411 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 162780098 and 162780107.

It is not a weakly prime, because it can be changed into another prime (162780133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81390069 + 81390070.

It is an arithmetic number, because the mean of its divisors is an integer number (81390070).

Almost surely, 2^162780139 is an apocalyptic number.

162780139 is a deficient number, since it is larger than the sum of its proper divisors (1).

162780139 is an equidigital number, since it uses as much as digits as its factorization.

162780139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 162780139 is about 12758.5320080329. The cubic root of 162780139 is about 546.0098427472.

The spelling of 162780139 in words is "one hundred sixty-two million, seven hundred eighty thousand, one hundred thirty-nine".