139945373 has 2 divisors, whose sum is σ = 139945374. Its totient is φ = 139945372.

The previous prime is 139945369. The next prime is 139945397. The reversal of 139945373 is 373549931.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126270169 + 13675204 = 11237^2 + 3698^2 .

It is a cyclic number.

It is not a de Polignac number, because 139945373 - 2² = 139945369 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139945313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69972686 + 69972687.

It is an arithmetic number, because the mean of its divisors is an integer number (69972687).

Almost surely, 2^139945373 is an apocalyptic number.

It is an amenable number.

139945373 is a deficient number, since it is larger than the sum of its proper divisors (1).

139945373 is an equidigital number, since it uses as much as digits as its factorization.

139945373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 306180, while the sum is 44.

The square root of 139945373 is about 11829.8509289002. The cubic root of 139945373 is about 519.1818655956.

The spelling of 139945373 in words is "one hundred thirty-nine million, nine hundred forty-five thousand, three hundred seventy-three".