161662727 has 2 divisors, whose sum is σ = 161662728. Its totient is φ = 161662726.

The previous prime is 161662703. The next prime is 161662729. The reversal of 161662727 is 727266161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161662727 - 2⁶ = 161662663 is a prime.

It is a super-2 number, since 2×161662727² = 52269674602153058, which contains 22 as substring.

Together with 161662729, 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 (161662729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80831363 + 80831364.

It is an arithmetic number, because the mean of its divisors is an integer number (80831364).

Almost surely, 2^161662727 is an apocalyptic number.

161662727 is a deficient number, since it is larger than the sum of its proper divisors (1).

161662727 is an equidigital number, since it uses as much as digits as its factorization.

161662727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 38.

The square root of 161662727 is about 12714.6658233711. The cubic root of 161662727 is about 544.7576028365.

The spelling of 161662727 in words is "one hundred sixty-one million, six hundred sixty-two thousand, seven hundred twenty-seven".