165609463 has 2 divisors, whose sum is σ = 165609464. Its totient is φ = 165609462.

The previous prime is 165609421. The next prime is 165609473. The reversal of 165609463 is 364906561.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165609463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165609403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82804731 + 82804732.

It is an arithmetic number, because the mean of its divisors is an integer number (82804732).

Almost surely, 2^165609463 is an apocalyptic number.

165609463 is a deficient number, since it is larger than the sum of its proper divisors (1).

165609463 is an equidigital number, since it uses as much as digits as its factorization.

165609463 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 165609463 is about 12868.9340273389. The cubic root of 165609463 is about 549.1551359127.

The spelling of 165609463 in words is "one hundred sixty-five million, six hundred nine thousand, four hundred sixty-three".