161786941 has 8 divisors (see below), whose sum is σ = 167161280. Its totient is φ = 156485952.

The previous prime is 161786939. The next prime is 161786981. The reversal of 161786941 is 149687161.

161786941 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 not a de Polignac number, because 161786941 - 2¹ = 161786939 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161786921) 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, 13836 + ... + 22693.

It is an arithmetic number, because the mean of its divisors is an integer number (20895160).

Almost surely, 2^161786941 is an apocalyptic number.

It is an amenable number.

161786941 is a deficient number, since it is larger than the sum of its proper divisors (5374339).

161786941 is a wasteful number, since it uses less digits than its factorization.

161786941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36675.

The product of its digits is 72576, while the sum is 43.

The square root of 161786941 is about 12719.5495596346. The cubic root of 161786941 is about 544.8970891175.

The spelling of 161786941 in words is "one hundred sixty-one million, seven hundred eighty-six thousand, nine hundred forty-one".