139667917 has 8 divisors (see below), whose sum is σ = 147872160. Its totient is φ = 131549040.

The previous prime is 139667881. The next prime is 139667939. The reversal of 139667917 is 719766931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 139667917 - 2²⁷ = 5450189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139667977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17959 + ... + 24532.

It is an arithmetic number, because the mean of its divisors is an integer number (18484020).

Almost surely, 2^139667917 is an apocalyptic number.

It is an amenable number.

139667917 is a deficient number, since it is larger than the sum of its proper divisors (8204243).

139667917 is a wasteful number, since it uses less digits than its factorization.

139667917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42683.

The product of its digits is 428652, while the sum is 49.

The square root of 139667917 is about 11818.1181666118. The cubic root of 139667917 is about 518.8385282308.

The spelling of 139667917 in words is "one hundred thirty-nine million, six hundred sixty-seven thousand, nine hundred seventeen".