161408743 has 8 divisors (see below), whose sum is σ = 170277120. Its totient is φ = 152577720.

The previous prime is 161408729. The next prime is 161408747. The reversal of 161408743 is 347804161.

It is a happy number.

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 161408743 - 2⁹ = 161408231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161408699 and 161408708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161408747) 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, 223 + ... + 17968.

It is an arithmetic number, because the mean of its divisors is an integer number (21284640).

Almost surely, 2^161408743 is an apocalyptic number.

161408743 is a deficient number, since it is larger than the sum of its proper divisors (8868377).

161408743 is a wasteful number, since it uses less digits than its factorization.

161408743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18677.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 161408743 is about 12704.6740611477. The cubic root of 161408743 is about 544.4721685899.

The spelling of 161408743 in words is "one hundred sixty-one million, four hundred eight thousand, seven hundred forty-three".