165531479 has 2 divisors, whose sum is σ = 165531480. Its totient is φ = 165531478.

The previous prime is 165531463. The next prime is 165531481. The reversal of 165531479 is 974135561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165531479 - 2⁴ = 165531463 is a prime.

Together with 165531481, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165537479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82765739 + 82765740.

It is an arithmetic number, because the mean of its divisors is an integer number (82765740).

Almost surely, 2^165531479 is an apocalyptic number.

165531479 is a deficient number, since it is larger than the sum of its proper divisors (1).

165531479 is an equidigital number, since it uses as much as digits as its factorization.

165531479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113400, while the sum is 41.

The square root of 165531479 is about 12865.9037381756. The cubic root of 165531479 is about 549.0689249818.

The spelling of 165531479 in words is "one hundred sixty-five million, five hundred thirty-one thousand, four hundred seventy-nine".