139643633 has 2 divisors, whose sum is σ = 139643634. Its totient is φ = 139643632.

The previous prime is 139643617. The next prime is 139643659. The reversal of 139643633 is 336346931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126517504 + 13126129 = 11248^2 + 3623^2 .

It is a cyclic number.

It is not a de Polignac number, because 139643633 - 2⁴ = 139643617 is a prime.

It is not a weakly prime, because it can be changed into another prime (139643683) 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 as a sum of consecutive naturals, namely, 69821816 + 69821817.

It is an arithmetic number, because the mean of its divisors is an integer number (69821817).

Almost surely, 2^139643633 is an apocalyptic number.

It is an amenable number.

139643633 is a deficient number, since it is larger than the sum of its proper divisors (1).

139643633 is an equidigital number, since it uses as much as digits as its factorization.

139643633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 38.

The square root of 139643633 is about 11817.0907164158. The cubic root of 139643633 is about 518.8084564115.

The spelling of 139643633 in words is "one hundred thirty-nine million, six hundred forty-three thousand, six hundred thirty-three".