139697855 has 8 divisors (see below), whose sum is σ = 182877264. Its totient is φ = 101598400.

The previous prime is 139697849. The next prime is 139697867. The reversal of 139697855 is 558796931.

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

It is not a de Polignac number, because 139697855 - 2⁸ = 139697599 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139697797 and 139697806.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1269926 + ... + 1270035.

It is an arithmetic number, because the mean of its divisors is an integer number (22859658).

Almost surely, 2^139697855 is an apocalyptic number.

139697855 is a deficient number, since it is larger than the sum of its proper divisors (43179409).

139697855 is a wasteful number, since it uses less digits than its factorization.

139697855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2539977.

The product of its digits is 2041200, while the sum is 53.

The square root of 139697855 is about 11819.3847132581. The cubic root of 139697855 is about 518.8755968206.

The spelling of 139697855 in words is "one hundred thirty-nine million, six hundred ninety-seven thousand, eight hundred fifty-five".