139743913 has 2 divisors, whose sum is σ = 139743914. Its totient is φ = 139743912.

The previous prime is 139743889. The next prime is 139743983. The reversal of 139743913 is 319347931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118657449 + 21086464 = 10893^2 + 4592^2 .

It is a cyclic number.

It is not a de Polignac number, because 139743913 - 2¹⁷ = 139612841 is a prime.

It is a super-2 number, since 2×139743913² = 39056722441103138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (139743983) 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, 69871956 + 69871957.

It is an arithmetic number, because the mean of its divisors is an integer number (69871957).

Almost surely, 2^139743913 is an apocalyptic number.

It is an amenable number.

139743913 is a deficient number, since it is larger than the sum of its proper divisors (1).

139743913 is an equidigital number, since it uses as much as digits as its factorization.

139743913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61236, while the sum is 40.

The square root of 139743913 is about 11821.3329620648. The cubic root of 139743913 is about 518.9326145090.

The spelling of 139743913 in words is "one hundred thirty-nine million, seven hundred forty-three thousand, nine hundred thirteen".