139004645 has 16 divisors (see below), whose sum is σ = 180118512. Its totient is φ = 102374400.

The previous prime is 139004639. The next prime is 139004647. The reversal of 139004645 is 546400931.

It can be written as a sum of positive squares in 8 ways, for example, as 25411681 + 113592964 = 5041^2 + 10658^2 .

It is not a de Polignac number, because 139004645 - 2¹⁴ = 138988261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139004647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23399 + ... + 28731.

It is an arithmetic number, because the mean of its divisors is an integer number (11257407).

Almost surely, 2^139004645 is an apocalyptic number.

It is an amenable number.

139004645 is a deficient number, since it is larger than the sum of its proper divisors (41113867).

139004645 is a wasteful number, since it uses less digits than its factorization.

139004645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5752.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 139004645 is about 11790.0231127848. The cubic root of 139004645 is about 518.0159168347.

The spelling of 139004645 in words is "one hundred thirty-nine million, four thousand, six hundred forty-five".