139105345 has 8 divisors (see below), whose sum is σ = 167035176. Its totient is φ = 111211776.

The previous prime is 139105331. The next prime is 139105349. The reversal of 139105345 is 543501931.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 44315649 + 94789696 = 6657^2 + 9736^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 139105345 - 2¹⁹ = 138581057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139105349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249 + ... + 16681.

It is an arithmetic number, because the mean of its divisors is an integer number (20879397).

Almost surely, 2^139105345 is an apocalyptic number.

It is an amenable number.

139105345 is a deficient number, since it is larger than the sum of its proper divisors (27929831).

139105345 is a wasteful number, since it uses less digits than its factorization.

139105345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18131.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 139105345 is about 11794.2928995341. The cubic root of 139105345 is about 518.1409764718.

The spelling of 139105345 in words is "one hundred thirty-nine million, one hundred five thousand, three hundred forty-five".