139813169 has 4 divisors (see below), whose sum is σ = 139932144. Its totient is φ = 139694196.

The previous prime is 139813139. The next prime is 139813171. The reversal of 139813169 is 961318931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 961318931 = 2647 ⋅363173.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139813169 is a prime.

It is a super-2 number, since 2×139813169² = 39095444451645122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (139813139) 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, 57707 + ... + 60080.

It is an arithmetic number, because the mean of its divisors is an integer number (34983036).

Almost surely, 2^139813169 is an apocalyptic number.

It is an amenable number.

139813169 is a deficient number, since it is larger than the sum of its proper divisors (118975).

139813169 is a wasteful number, since it uses less digits than its factorization.

139813169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118974.

The product of its digits is 34992, while the sum is 41.

The square root of 139813169 is about 11824.2618797116. The cubic root of 139813169 is about 519.0183266781.

The spelling of 139813169 in words is "one hundred thirty-nine million, eight hundred thirteen thousand, one hundred sixty-nine".