184139993 has 2 divisors, whose sum is σ = 184139994. Its totient is φ = 184139992.

The previous prime is 184139953. The next prime is 184140017. The reversal of 184139993 is 399931481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148522969 + 35617024 = 12187^2 + 5968^2 .

It is a cyclic number.

It is not a de Polignac number, because 184139993 - 2⁶ = 184139929 is a prime.

It is not a weakly prime, because it can be changed into another prime (184139933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92069996 + 92069997.

It is an arithmetic number, because the mean of its divisors is an integer number (92069997).

Almost surely, 2^184139993 is an apocalyptic number.

It is an amenable number.

184139993 is a deficient number, since it is larger than the sum of its proper divisors (1).

184139993 is an equidigital number, since it uses as much as digits as its factorization.

184139993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 47.

The square root of 184139993 is about 13569.8191955530. The cubic root of 184139993 is about 568.9176063127.

The spelling of 184139993 in words is "one hundred eighty-four million, one hundred thirty-nine thousand, nine hundred ninety-three".