139598985 has 32 divisors (see below), whose sum is σ = 248952960. Its totient is φ = 66382848.

The previous prime is 139598981. The next prime is 139599017. The reversal of 139598985 is 589895931.

It is not a de Polignac number, because 139598985 - 2² = 139598981 is a prime.

It is a super-2 number, since 2×139598985² = 38975753226060450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (139598981) 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, 9562 + ... + 19251.

It is an arithmetic number, because the mean of its divisors is an integer number (7779780).

Almost surely, 2^139598985 is an apocalyptic number.

139598985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139598985 is a deficient number, since it is larger than the sum of its proper divisors (109353975).

139598985 is a wasteful number, since it uses less digits than its factorization.

139598985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28857.

The product of its digits is 3499200, while the sum is 57.

The square root of 139598985 is about 11815.2014371317. The cubic root of 139598985 is about 518.7531579621.

The spelling of 139598985 in words is "one hundred thirty-nine million, five hundred ninety-eight thousand, nine hundred eighty-five".