139936417 has 2 divisors, whose sum is σ = 139936418. Its totient is φ = 139936416.

The previous prime is 139936411. The next prime is 139936421. The reversal of 139936417 is 714639931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106481761 + 33454656 = 10319^2 + 5784^2 .

It is a cyclic number.

It is not a de Polignac number, because 139936417 - 2⁷ = 139936289 is a prime.

It is not a weakly prime, because it can be changed into another prime (139936411) 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, 69968208 + 69968209.

It is an arithmetic number, because the mean of its divisors is an integer number (69968209).

Almost surely, 2^139936417 is an apocalyptic number.

It is an amenable number.

139936417 is a deficient number, since it is larger than the sum of its proper divisors (1).

139936417 is an equidigital number, since it uses as much as digits as its factorization.

139936417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 43.

The square root of 139936417 is about 11829.4723889107. The cubic root of 139936417 is about 519.1707901026.

The spelling of 139936417 in words is "one hundred thirty-nine million, nine hundred thirty-six thousand, four hundred seventeen".