183742421 has 4 divisors (see below), whose sum is σ = 185526432. Its totient is φ = 181958412.

The previous prime is 183742417. The next prime is 183742439. The reversal of 183742421 is 124247381.

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, and also an emirpimes, since its reverse is a distinct semiprime: 124247381 = 1753 ⋅70877.

It is a cyclic number.

It is not a de Polignac number, because 183742421 - 2² = 183742417 is a prime.

It is a super-2 number, since 2×183742421² = 67522554549882482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (183742441) 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, 891851 + ... + 892056.

It is an arithmetic number, because the mean of its divisors is an integer number (46381608).

Almost surely, 2^183742421 is an apocalyptic number.

It is an amenable number.

183742421 is a deficient number, since it is larger than the sum of its proper divisors (1784011).

183742421 is a wasteful number, since it uses less digits than its factorization.

183742421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1784010.

The product of its digits is 10752, while the sum is 32.

The square root of 183742421 is about 13555.1621532168. The cubic root of 183742421 is about 568.5078660812.

The spelling of 183742421 in words is "one hundred eighty-three million, seven hundred forty-two thousand, four hundred twenty-one".