139314817 has 4 divisors (see below), whose sum is σ = 139857156. Its totient is φ = 138772480.

The previous prime is 139314787. The next prime is 139314823. The reversal of 139314817 is 718413931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 106584976 + 32729841 = 10324^2 + 5721^2 .

It is a cyclic number.

It is not a de Polignac number, because 139314817 - 2⁷ = 139314689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139314017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270784 + ... + 271297.

It is an arithmetic number, because the mean of its divisors is an integer number (34964289).

Almost surely, 2^139314817 is an apocalyptic number.

It is an amenable number.

139314817 is a deficient number, since it is larger than the sum of its proper divisors (542339).

139314817 is an equidigital number, since it uses as much as digits as its factorization.

139314817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542338.

The product of its digits is 18144, while the sum is 37.

The square root of 139314817 is about 11803.1697861210. The cubic root of 139314817 is about 518.4009271646.

The spelling of 139314817 in words is "one hundred thirty-nine million, three hundred fourteen thousand, eight hundred seventeen".