161930293 has 8 divisors (see below), whose sum is σ = 194803520. Its totient is φ = 131492160.

The previous prime is 161930273. The next prime is 161930311. The reversal of 161930293 is 392039161.

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

It is not a de Polignac number, because 161930293 - 2¹⁷ = 161799221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161930273) 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, 608628 + ... + 608893.

It is an arithmetic number, because the mean of its divisors is an integer number (24350440).

Almost surely, 2^161930293 is an apocalyptic number.

It is an amenable number.

161930293 is a deficient number, since it is larger than the sum of its proper divisors (32873227).

161930293 is a wasteful number, since it uses less digits than its factorization.

161930293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217547.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 161930293 is about 12725.1834171457. The cubic root of 161930293 is about 545.0579777279.

The spelling of 161930293 in words is "one hundred sixty-one million, nine hundred thirty thousand, two hundred ninety-three".