139835401 has 2 divisors, whose sum is σ = 139835402. Its totient is φ = 139835400.

The previous prime is 139835323. The next prime is 139835413. The reversal of 139835401 is 104538931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72267001 + 67568400 = 8501^2 + 8220^2 .

It is a cyclic number.

It is not a de Polignac number, because 139835401 - 2⁷ = 139835273 is a prime.

It is not a weakly prime, because it can be changed into another prime (139835471) 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, 69917700 + 69917701.

It is an arithmetic number, because the mean of its divisors is an integer number (69917701).

Almost surely, 2^139835401 is an apocalyptic number.

It is an amenable number.

139835401 is a deficient number, since it is larger than the sum of its proper divisors (1).

139835401 is an equidigital number, since it uses as much as digits as its factorization.

139835401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 139835401 is about 11825.2019433074. The cubic root of 139835401 is about 519.0458353026.

The spelling of 139835401 in words is "one hundred thirty-nine million, eight hundred thirty-five thousand, four hundred one".