183418421 has 2 divisors, whose sum is σ = 183418422. Its totient is φ = 183418420.

The previous prime is 183418397. The next prime is 183418439. The reversal of 183418421 is 124814381.

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., 107536900 + 75881521 = 10370^2 + 8711^2 .

It is a cyclic number.

It is not a de Polignac number, because 183418421 - 2⁶ = 183418357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (183418481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 91709210 + 91709211.

It is an arithmetic number, because the mean of its divisors is an integer number (91709211).

Almost surely, 2^183418421 is an apocalyptic number.

It is an amenable number.

183418421 is a deficient number, since it is larger than the sum of its proper divisors (1).

183418421 is an equidigital number, since it uses as much as digits as its factorization.

183418421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6144, while the sum is 32.

The square root of 183418421 is about 13543.2057135672. The cubic root of 183418421 is about 568.1735122963.

It can be divided in two parts, 18341 and 8421, that added together give a palindrome (26762).

The spelling of 183418421 in words is "one hundred eighty-three million, four hundred eighteen thousand, four hundred twenty-one".