165996947 has 2 divisors, whose sum is σ = 165996948. Its totient is φ = 165996946.

The previous prime is 165996937. The next prime is 165996953. The reversal of 165996947 is 749699561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165996947 - 2¹⁰ = 165995923 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 165996892 and 165996901.

It is not a weakly prime, because it can be changed into another prime (165996917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82998473 + 82998474.

It is an arithmetic number, because the mean of its divisors is an integer number (82998474).

Almost surely, 2^165996947 is an apocalyptic number.

165996947 is a deficient number, since it is larger than the sum of its proper divisors (1).

165996947 is an equidigital number, since it uses as much as digits as its factorization.

165996947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3674160, while the sum is 56.

The square root of 165996947 is about 12883.9802468026. The cubic root of 165996947 is about 549.5830967369.

The spelling of 165996947 in words is "one hundred sixty-five million, nine hundred ninety-six thousand, nine hundred forty-seven".