161683045 has 8 divisors (see below), whose sum is σ = 194115096. Its totient is φ = 129282816.

The previous prime is 161683021. The next prime is 161683051. The reversal of 161683045 is 540386161.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 37249 + 161645796 = 193^2 + 12714^2 .

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 161683045 - 2⁵ = 161683013 is a prime.

It is a super-2 number, since 2×161683045² = 52282814080944050, which contains 22 as substring.

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 161683045.

It is a congruent number.

It is an unprimeable number.

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, 5209 + ... + 18721.

It is an arithmetic number, because the mean of its divisors is an integer number (24264387).

Almost surely, 2^161683045 is an apocalyptic number.

It is an amenable number.

161683045 is a deficient number, since it is larger than the sum of its proper divisors (32432051).

161683045 is a wasteful number, since it uses less digits than its factorization.

161683045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15911.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 161683045 is about 12715.4647968527. The cubic root of 161683045 is about 544.7804238490.

The spelling of 161683045 in words is "one hundred sixty-one million, six hundred eighty-three thousand, forty-five".