183121639949 has 2 divisors, whose sum is σ = 183121639950. Its totient is φ = 183121639948.

The previous prime is 183121639933. The next prime is 183121639991. The reversal of 183121639949 is 949936121381.

183121639949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175334812900 + 7786827049 = 418730^2 + 88243^2 .

It is a cyclic number.

It is not a de Polignac number, because 183121639949 - 2⁴ = 183121639933 is a prime.

It is a super-2 number, since 2×183121639949² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 183121639894 and 183121639903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (183121639549) 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 as a sum of consecutive naturals, namely, 91560819974 + 91560819975.

It is an arithmetic number, because the mean of its divisors is an integer number (91560819975).

Almost surely, 2^183121639949 is an apocalyptic number.

It is an amenable number.

183121639949 is a deficient number, since it is larger than the sum of its proper divisors (1).

183121639949 is an equidigital number, since it uses as much as digits as its factorization.

183121639949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2519424, while the sum is 56.

The spelling of 183121639949 in words is "one hundred eighty-three billion, one hundred twenty-one million, six hundred thirty-nine thousand, nine hundred forty-nine".