139353985 has 16 divisors (see below), whose sum is σ = 169456896. Its totient is φ = 110006208.

The previous prime is 139353971. The next prime is 139353997. The reversal of 139353985 is 589353931.

It is a cyclic number.

It is not a de Polignac number, because 139353985 - 2¹⁹ = 138829697 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 130564 + ... + 131626.

It is an arithmetic number, because the mean of its divisors is an integer number (10591056).

Almost surely, 2^139353985 is an apocalyptic number.

It is an amenable number.

139353985 is a deficient number, since it is larger than the sum of its proper divisors (30102911).

139353985 is a wasteful number, since it uses less digits than its factorization.

139353985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1392.

The product of its digits is 437400, while the sum is 46.

The square root of 139353985 is about 11804.8288848251. The cubic root of 139353985 is about 518.4495049718.

The spelling of 139353985 in words is "one hundred thirty-nine million, three hundred fifty-three thousand, nine hundred eighty-five".