161294723 has 8 divisors (see below), whose sum is σ = 167000400. Its totient is φ = 155598688.

The previous prime is 161294713. The next prime is 161294737. The reversal of 161294723 is 327492161.

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

It is not a de Polignac number, because 161294723 - 2⁶ = 161294659 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161294713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55808 + ... + 58626.

It is an arithmetic number, because the mean of its divisors is an integer number (20875050).

Almost surely, 2^161294723 is an apocalyptic number.

161294723 is a deficient number, since it is larger than the sum of its proper divisors (5705677).

161294723 is a wasteful number, since it uses less digits than its factorization.

161294723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4821.

The product of its digits is 18144, while the sum is 35.

The square root of 161294723 is about 12700.1859435207. The cubic root of 161294723 is about 544.3439323715.

The spelling of 161294723 in words is "one hundred sixty-one million, two hundred ninety-four thousand, seven hundred twenty-three".