139224897 has 24 divisors (see below), whose sum is σ = 230141184. Its totient is φ = 79449984.

The previous prime is 139224887. The next prime is 139224923. The reversal of 139224897 is 798422931.

It is not a de Polignac number, because 139224897 - 2⁴ = 139224881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139224817) 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 23 ways as a sum of consecutive naturals, for example, 88873 + ... + 90425.

It is an arithmetic number, because the mean of its divisors is an integer number (9589216).

Almost surely, 2^139224897 is an apocalyptic number.

It is an amenable number.

139224897 is a deficient number, since it is larger than the sum of its proper divisors (90916287).

139224897 is a wasteful number, since it uses less digits than its factorization.

139224897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2989 (or 2986 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 139224897 is about 11799.3600250183. The cubic root of 139224897 is about 518.2893701290.

The spelling of 139224897 in words is "one hundred thirty-nine million, two hundred twenty-four thousand, eight hundred ninety-seven".