139190085 has 12 divisors (see below), whose sum is σ = 241262892. Its totient is φ = 74234688.

The previous prime is 139190081. The next prime is 139190119. The reversal of 139190085 is 580091931.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 30008484 + 109181601 = 5478^2 + 10449^2 .

It is not a de Polignac number, because 139190085 - 2² = 139190081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139190081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1546512 + ... + 1546601.

It is an arithmetic number, because the mean of its divisors is an integer number (20105241).

Almost surely, 2^139190085 is an apocalyptic number.

139190085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139190085 is a deficient number, since it is larger than the sum of its proper divisors (102072807).

139190085 is a wasteful number, since it uses less digits than its factorization.

139190085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3093124 (or 3093121 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 139190085 is about 11797.8847680421. The cubic root of 139190085 is about 518.2461685801.

The spelling of 139190085 in words is "one hundred thirty-nine million, one hundred ninety thousand, eighty-five".