184990993 has 4 divisors (see below), whose sum is σ = 201808368. Its totient is φ = 168173620.

The previous prime is 184990969. The next prime is 184990999. The reversal of 184990993 is 399099481.

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: 399099481 = 11 ⋅36281771.

It is a cyclic number.

It is not a de Polignac number, because 184990993 - 2¹³ = 184982801 is a prime.

It is a super-2 number, since 2×184990993² = 68443334982252098, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 184990993.

It is not an unprimeable number, because it can be changed into a prime (184990999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8408671 + ... + 8408692.

It is an arithmetic number, because the mean of its divisors is an integer number (50452092).

Almost surely, 2^184990993 is an apocalyptic number.

It is an amenable number.

184990993 is a deficient number, since it is larger than the sum of its proper divisors (16817375).

184990993 is a wasteful number, since it uses less digits than its factorization.

184990993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16817374.

The product of its (nonzero) digits is 629856, while the sum is 52.

The square root of 184990993 is about 13601.1394008002. The cubic root of 184990993 is about 569.7926741626.

The spelling of 184990993 in words is "one hundred eighty-four million, nine hundred ninety thousand, nine hundred ninety-three".