161180947 has 2 divisors, whose sum is σ = 161180948. Its totient is φ = 161180946.

The previous prime is 161180879. The next prime is 161180953. The reversal of 161180947 is 749081161.

It is a strong prime.

It is an emirp because it is prime and its reverse (749081161) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161180947 is a prime.

It is not a weakly prime, because it can be changed into another prime (161180977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80590473 + 80590474.

It is an arithmetic number, because the mean of its divisors is an integer number (80590474).

Almost surely, 2^161180947 is an apocalyptic number.

161180947 is a deficient number, since it is larger than the sum of its proper divisors (1).

161180947 is an equidigital number, since it uses as much as digits as its factorization.

161180947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 161180947 is about 12695.7058488294. The cubic root of 161180947 is about 544.2159103213.

The spelling of 161180947 in words is "one hundred sixty-one million, one hundred eighty thousand, nine hundred forty-seven".