161892743 has 4 divisors (see below), whose sum is σ = 161987160. Its totient is φ = 161798328.

The previous prime is 161892739. The next prime is 161892767. The reversal of 161892743 is 347298161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161892743 - 2² = 161892739 is a prime.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161892743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161892713) 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 3 ways as a sum of consecutive naturals, for example, 44588 + ... + 48081.

It is an arithmetic number, because the mean of its divisors is an integer number (40496790).

Almost surely, 2^161892743 is an apocalyptic number.

161892743 is a deficient number, since it is larger than the sum of its proper divisors (94417).

161892743 is an equidigital number, since it uses as much as digits as its factorization.

161892743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94416.

The product of its digits is 72576, while the sum is 41.

The square root of 161892743 is about 12723.7079108254. The cubic root of 161892743 is about 545.0158433236.

The spelling of 161892743 in words is "one hundred sixty-one million, eight hundred ninety-two thousand, seven hundred forty-three".