139623241 has 2 divisors, whose sum is σ = 139623242. Its totient is φ = 139623240.

The previous prime is 139623203. The next prime is 139623251. The reversal of 139623241 is 142326931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92563641 + 47059600 = 9621^2 + 6860^2 .

It is a cyclic number.

It is not a de Polignac number, because 139623241 - 2¹¹ = 139621193 is a prime.

It is not a weakly prime, because it can be changed into another prime (139623251) 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, 69811620 + 69811621.

It is an arithmetic number, because the mean of its divisors is an integer number (69811621).

Almost surely, 2^139623241 is an apocalyptic number.

It is an amenable number.

139623241 is a deficient number, since it is larger than the sum of its proper divisors (1).

139623241 is an equidigital number, since it uses as much as digits as its factorization.

139623241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 31.

The square root of 139623241 is about 11816.2278667940. The cubic root of 139623241 is about 518.7832015136.

The spelling of 139623241 in words is "one hundred thirty-nine million, six hundred twenty-three thousand, two hundred forty-one".