161493943 has 8 divisors (see below), whose sum is σ = 174924288. Its totient is φ = 148207584.

The previous prime is 161493887. The next prime is 161493947. The reversal of 161493943 is 349394161.

161493943 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161493943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161493896 and 161493905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161493947) 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, 33655 + ... + 38152.

It is an arithmetic number, because the mean of its divisors is an integer number (21865536).

Almost surely, 2^161493943 is an apocalyptic number.

161493943 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

161493943 is a deficient number, since it is larger than the sum of its proper divisors (13430345).

161493943 is a wasteful number, since it uses less digits than its factorization.

161493943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71993.

The product of its digits is 69984, while the sum is 40.

The square root of 161493943 is about 12708.0267154268. The cubic root of 161493943 is about 544.5679520609.

The spelling of 161493943 in words is "one hundred sixty-one million, four hundred ninety-three thousand, nine hundred forty-three".