183990121 has 4 divisors (see below), whose sum is σ = 210274432. Its totient is φ = 157705812.

The previous prime is 183990119. The next prime is 183990137. The reversal of 183990121 is 121099381.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 183990121 - 2¹ = 183990119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (183990151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13142145 + ... + 13142158.

It is an arithmetic number, because the mean of its divisors is an integer number (52568608).

Almost surely, 2^183990121 is an apocalyptic number.

It is an amenable number.

183990121 is a deficient number, since it is larger than the sum of its proper divisors (26284311).

183990121 is an equidigital number, since it uses as much as digits as its factorization.

183990121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26284310.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 183990121 is about 13564.2958165914. The cubic root of 183990121 is about 568.7632165990.

The spelling of 183990121 in words is "one hundred eighty-three million, nine hundred ninety thousand, one hundred twenty-one".