161330947 has 4 divisors (see below), whose sum is σ = 168345360. Its totient is φ = 154316536.

The previous prime is 161330933. The next prime is 161330951. The reversal of 161330947 is 749033161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 749033161 = 5519 ⋅135719.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161330947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161330927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3507172 + ... + 3507217.

It is an arithmetic number, because the mean of its divisors is an integer number (42086340).

Almost surely, 2^161330947 is an apocalyptic number.

161330947 is a deficient number, since it is larger than the sum of its proper divisors (7014413).

161330947 is an equidigital number, since it uses as much as digits as its factorization.

161330947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7014412.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 161330947 is about 12701.6119843113. The cubic root of 161330947 is about 544.3846793931.

The spelling of 161330947 in words is "one hundred sixty-one million, three hundred thirty thousand, nine hundred forty-seven".