139885655 has 32 divisors (see below), whose sum is σ = 215599104. Its totient is φ = 84686976.

The previous prime is 139885651. The next prime is 139885663. The reversal of 139885655 is 556588931.

It is a cyclic number.

It is not a de Polignac number, because 139885655 - 2² = 139885651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139885651) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3782 + ... + 17148.

It is an arithmetic number, because the mean of its divisors is an integer number (6737472).

Almost surely, 2^139885655 is an apocalyptic number.

139885655 is a deficient number, since it is larger than the sum of its proper divisors (75713449).

139885655 is a wasteful number, since it uses less digits than its factorization.

139885655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13415.

The product of its digits is 1296000, while the sum is 50.

The square root of 139885655 is about 11827.3266210078. The cubic root of 139885655 is about 519.1080060289.

The spelling of 139885655 in words is "one hundred thirty-nine million, eight hundred eighty-five thousand, six hundred fifty-five".