139144493 has 2 divisors, whose sum is σ = 139144494. Its totient is φ = 139144492.

The previous prime is 139144459. The next prime is 139144501. The reversal of 139144493 is 394441931.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136843204 + 2301289 = 11698^2 + 1517^2 .

It is a cyclic number.

It is not a de Polignac number, because 139144493 - 2⁸ = 139144237 is a prime.

It is a super-2 number, since 2×139144493² = 38722379864454098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139134493) 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, 69572246 + 69572247.

It is an arithmetic number, because the mean of its divisors is an integer number (69572247).

Almost surely, 2^139144493 is an apocalyptic number.

It is an amenable number.

139144493 is a deficient number, since it is larger than the sum of its proper divisors (1).

139144493 is an equidigital number, since it uses as much as digits as its factorization.

139144493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 38.

The square root of 139144493 is about 11795.9523990223. The cubic root of 139144493 is about 518.1895781997.

The spelling of 139144493 in words is "one hundred thirty-nine million, one hundred forty-four thousand, four hundred ninety-three".