139784233 has 2 divisors, whose sum is σ = 139784234. Its totient is φ = 139784232.

The previous prime is 139784221. The next prime is 139784243. The reversal of 139784233 is 332487931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73410624 + 66373609 = 8568^2 + 8147^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139784233 is a prime.

It is not a weakly prime, because it can be changed into another prime (139784213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69892116 + 69892117.

It is an arithmetic number, because the mean of its divisors is an integer number (69892117).

Almost surely, 2^139784233 is an apocalyptic number.

It is an amenable number.

139784233 is a deficient number, since it is larger than the sum of its proper divisors (1).

139784233 is an equidigital number, since it uses as much as digits as its factorization.

139784233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 40.

The square root of 139784233 is about 11823.0382305057. The cubic root of 139784233 is about 518.9825185336.

The spelling of 139784233 in words is "one hundred thirty-nine million, seven hundred eighty-four thousand, two hundred thirty-three".