139941623 has 2 divisors, whose sum is σ = 139941624. Its totient is φ = 139941622.

The previous prime is 139941619. The next prime is 139941679. The reversal of 139941623 is 326149931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139941623 - 2² = 139941619 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139943623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69970811 + 69970812.

It is an arithmetic number, because the mean of its divisors is an integer number (69970812).

Almost surely, 2^139941623 is an apocalyptic number.

139941623 is a deficient number, since it is larger than the sum of its proper divisors (1).

139941623 is an equidigital number, since it uses as much as digits as its factorization.

139941623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 38.

The square root of 139941623 is about 11829.6924304903. The cubic root of 139941623 is about 519.1772281923.

The spelling of 139941623 in words is "one hundred thirty-nine million, nine hundred forty-one thousand, six hundred twenty-three".