161716953 has 8 divisors (see below), whose sum is σ = 215869248. Its totient is φ = 107687984.

The previous prime is 161716949. The next prime is 161716957. The reversal of 161716953 is 359617161.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (161716949) and next prime (161716957).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161716953 - 2² = 161716949 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161716957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27726 + ... + 33047.

It is an arithmetic number, because the mean of its divisors is an integer number (26983656).

Almost surely, 2^161716953 is an apocalyptic number.

It is an amenable number.

161716953 is a deficient number, since it is larger than the sum of its proper divisors (54152295).

161716953 is an equidigital number, since it uses as much as digits as its factorization.

161716953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61663.

The product of its digits is 34020, while the sum is 39.

The square root of 161716953 is about 12716.7980639782. The cubic root of 161716953 is about 544.8185047816.

The spelling of 161716953 in words is "one hundred sixty-one million, seven hundred sixteen thousand, nine hundred fifty-three".