139309241 has 2 divisors, whose sum is σ = 139309242. Its totient is φ = 139309240.

The previous prime is 139309217. The next prime is 139309249. The reversal of 139309241 is 142903931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136983616 + 2325625 = 11704^2 + 1525^2 .

It is a cyclic number.

It is not a de Polignac number, because 139309241 - 2²² = 135114937 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 139309198 and 139309207.

It is not a weakly prime, because it can be changed into another prime (139309249) 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, 69654620 + 69654621.

It is an arithmetic number, because the mean of its divisors is an integer number (69654621).

Almost surely, 2^139309241 is an apocalyptic number.

It is an amenable number.

139309241 is a deficient number, since it is larger than the sum of its proper divisors (1).

139309241 is an equidigital number, since it uses as much as digits as its factorization.

139309241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 139309241 is about 11802.9335760225. The cubic root of 139309241 is about 518.3940108337.

The spelling of 139309241 in words is "one hundred thirty-nine million, three hundred nine thousand, two hundred forty-one".