161930955 has 8 divisors (see below), whose sum is σ = 259089552. Its totient is φ = 86363168.

The previous prime is 161930947. The next prime is 161930957. The reversal of 161930955 is 559039161.

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 161930955 - 2³ = 161930947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161930957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5397684 + ... + 5397713.

It is an arithmetic number, because the mean of its divisors is an integer number (32386194).

Almost surely, 2^161930955 is an apocalyptic number.

161930955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161930955 is a deficient number, since it is larger than the sum of its proper divisors (97158597).

161930955 is a wasteful number, since it uses less digits than its factorization.

161930955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10795405.

The product of its (nonzero) digits is 36450, while the sum is 39.

The square root of 161930955 is about 12725.2094285320. The cubic root of 161930955 is about 545.0587204917.

The spelling of 161930955 in words is "one hundred sixty-one million, nine hundred thirty thousand, nine hundred fifty-five".