170139789 has 6 divisors (see below), whose sum is σ = 245757486. Its totient is φ = 113426520.

The previous prime is 170139779. The next prime is 170139817. The reversal of 170139789 is 987931071.

It can be written as a sum of positive squares in only one way, i.e., 156875625 + 13264164 = 12525^2 + 3642^2 .

It is a de Polignac number, because none of the positive numbers 2^k-170139789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (170139719) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9452202 + ... + 9452219.

It is an arithmetic number, because the mean of its divisors is an integer number (40959581).

Almost surely, 2^170139789 is an apocalyptic number.

It is an amenable number.

170139789 is a deficient number, since it is larger than the sum of its proper divisors (75617697).

170139789 is a wasteful number, since it uses less digits than its factorization.

170139789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18904427 (or 18904424 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 45.

The square root of 170139789 is about 13043.7643722968. The cubic root of 170139789 is about 554.1176239361.

The spelling of 170139789 in words is "one hundred seventy million, one hundred thirty-nine thousand, seven hundred eighty-nine".