139885097 has 4 divisors (see below), whose sum is σ = 152601936. Its totient is φ = 127168260.

The previous prime is 139885093. The next prime is 139885117. The reversal of 139885097 is 790588931.

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: 790588931 = 11 ⋅71871721.

It is a cyclic number.

It is not a de Polignac number, because 139885097 - 2² = 139885093 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139885093) 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 3 ways as a sum of consecutive naturals, for example, 6358403 + ... + 6358424.

It is an arithmetic number, because the mean of its divisors is an integer number (38150484).

Almost surely, 2^139885097 is an apocalyptic number.

It is an amenable number.

139885097 is a deficient number, since it is larger than the sum of its proper divisors (12716839).

139885097 is a wasteful number, since it uses less digits than its factorization.

139885097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12716838.

The product of its (nonzero) digits is 544320, while the sum is 50.

The square root of 139885097 is about 11827.3030315453. The cubic root of 139885097 is about 519.1073157922.

The spelling of 139885097 in words is "one hundred thirty-nine million, eight hundred eighty-five thousand, ninety-seven".