139456433 has 2 divisors, whose sum is σ = 139456434. Its totient is φ = 139456432.

The previous prime is 139456411. The next prime is 139456451. The reversal of 139456433 is 334654931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111872929 + 27583504 = 10577^2 + 5252^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139456433 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p_7883138 and since 139456433 and 7883138 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (139456483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69728216 + 69728217.

It is an arithmetic number, because the mean of its divisors is an integer number (69728217).

Almost surely, 2^139456433 is an apocalyptic number.

It is an amenable number.

139456433 is a deficient number, since it is larger than the sum of its proper divisors (1).

139456433 is an equidigital number, since it uses as much as digits as its factorization.

139456433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 38.

The square root of 139456433 is about 11809.1673288170. The cubic root of 139456433 is about 518.5765222804.

The spelling of 139456433 in words is "one hundred thirty-nine million, four hundred fifty-six thousand, four hundred thirty-three".