165273947 has 2 divisors, whose sum is σ = 165273948. Its totient is φ = 165273946.

The previous prime is 165273943. The next prime is 165273961. The reversal of 165273947 is 749372561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165273947 - 2² = 165273943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165273898 and 165273907.

It is not a weakly prime, because it can be changed into another prime (165273943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82636973 + 82636974.

It is an arithmetic number, because the mean of its divisors is an integer number (82636974).

Almost surely, 2^165273947 is an apocalyptic number.

165273947 is a deficient number, since it is larger than the sum of its proper divisors (1).

165273947 is an equidigital number, since it uses as much as digits as its factorization.

165273947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 44.

The square root of 165273947 is about 12855.8915287894. The cubic root of 165273947 is about 548.7840321150.

The spelling of 165273947 in words is "one hundred sixty-five million, two hundred seventy-three thousand, nine hundred forty-seven".