181983697 has 12 divisors (see below), whose sum is σ = 216620976. Its totient is φ = 152356680.

The previous prime is 181983673. The next prime is 181983701. The reversal of 181983697 is 796389181.

It is a happy number.

It is not a de Polignac number, because 181983697 - 2⁷ = 181983569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181983617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41079 + ... + 45292.

It is an arithmetic number, because the mean of its divisors is an integer number (18051748).

Almost surely, 2^181983697 is an apocalyptic number.

It is an amenable number.

181983697 is a deficient number, since it is larger than the sum of its proper divisors (34637279).

181983697 is an equidigital number, since it uses as much as digits as its factorization.

181983697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86428 (or 86421 counting only the distinct ones).

The product of its digits is 653184, while the sum is 52.

The square root of 181983697 is about 13490.1333203197. The cubic root of 181983697 is about 566.6881890711.

The spelling of 181983697 in words is "one hundred eighty-one million, nine hundred eighty-three thousand, six hundred ninety-seven".