183143921 has 2 divisors, whose sum is σ = 183143922. Its totient is φ = 183143920.

The previous prime is 183143911. The next prime is 183143951. The reversal of 183143921 is 129341381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96746896 + 86397025 = 9836^2 + 9295^2 .

It is a cyclic number.

It is not a de Polignac number, because 183143921 - 2¹⁴ = 183127537 is a prime.

It is equal to p_10195187 and since 183143921 and 10195187 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (183143911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 91571960 + 91571961.

It is an arithmetic number, because the mean of its divisors is an integer number (91571961).

Almost surely, 2^183143921 is an apocalyptic number.

It is an amenable number.

183143921 is a deficient number, since it is larger than the sum of its proper divisors (1).

183143921 is an equidigital number, since it uses as much as digits as its factorization.

183143921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 32.

The square root of 183143921 is about 13533.0676862269. The cubic root of 183143921 is about 567.8899320958.

The spelling of 183143921 in words is "one hundred eighty-three million, one hundred forty-three thousand, nine hundred twenty-one".