183312421 has 2 divisors, whose sum is σ = 183312422. Its totient is φ = 183312420.

The previous prime is 183312407. The next prime is 183312427. The reversal of 183312421 is 124213381.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178516321 + 4796100 = 13361^2 + 2190^2 .

It is an emirp because it is prime and its reverse (124213381) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-183312421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (183312427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 91656210 + 91656211.

It is an arithmetic number, because the mean of its divisors is an integer number (91656211).

Almost surely, 2^183312421 is an apocalyptic number.

It is an amenable number.

183312421 is a deficient number, since it is larger than the sum of its proper divisors (1).

183312421 is an equidigital number, since it uses as much as digits as its factorization.

183312421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 25.

The square root of 183312421 is about 13539.2917466166. The cubic root of 183312421 is about 568.0640394717.

The spelling of 183312421 in words is "one hundred eighty-three million, three hundred twelve thousand, four hundred twenty-one".