161576747 has 2 divisors, whose sum is σ = 161576748. Its totient is φ = 161576746.

The previous prime is 161576717. The next prime is 161576749. The reversal of 161576747 is 747675161.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (747675161) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161576747 is a prime.

It is a super-2 number, since 2×161576747² = 52214090342204018, which contains 22 as substring.

Together with 161576749, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 161576698 and 161576707.

It is not a weakly prime, because it can be changed into another prime (161576749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80788373 + 80788374.

It is an arithmetic number, because the mean of its divisors is an integer number (80788374).

Almost surely, 2^161576747 is an apocalyptic number.

161576747 is a deficient number, since it is larger than the sum of its proper divisors (1).

161576747 is an equidigital number, since it uses as much as digits as its factorization.

161576747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 246960, while the sum is 44.

The square root of 161576747 is about 12711.2842388171. The cubic root of 161576747 is about 544.6610096275.

The spelling of 161576747 in words is "one hundred sixty-one million, five hundred seventy-six thousand, seven hundred forty-seven".