182990172921 has 4 divisors (see below), whose sum is σ = 243986897232. Its totient is φ = 121993448612.

The previous prime is 182990172899. The next prime is 182990172947. The reversal of 182990172921 is 129271099281.

182990172921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 182990172921 - 2²⁶ = 182923064057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (182990176921) 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, 30498362151 + ... + 30498362156.

It is an arithmetic number, because the mean of its divisors is an integer number (60996724308).

Almost surely, 2^182990172921 is an apocalyptic number.

It is an amenable number.

182990172921 is a deficient number, since it is larger than the sum of its proper divisors (60996724311).

182990172921 is an equidigital number, since it uses as much as digits as its factorization.

182990172921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60996724310.

The product of its (nonzero) digits is 326592, while the sum is 51.

The spelling of 182990172921 in words is "one hundred eighty-two billion, nine hundred ninety million, one hundred seventy-two thousand, nine hundred twenty-one".