139725198 has 12 divisors (see below), whose sum is σ = 302737968. Its totient is φ = 46575060.

The previous prime is 139725149. The next prime is 139725211. The reversal of 139725198 is 891527931.

139725198 is a `hidden beast` number, since 1 + 397 + 251 + 9 + 8 = 666.

It is a super-2 number, since 2×139725198² = 39046261912278408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3881238 + ... + 3881273.

It is an arithmetic number, because the mean of its divisors is an integer number (25228164).

Almost surely, 2^139725198 is an apocalyptic number.

139725198 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

139725198 is an abundant number, since it is smaller than the sum of its proper divisors (163012770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139725198 is a wasteful number, since it uses less digits than its factorization.

139725198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7762519 (or 7762516 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 139725198 is about 11820.5413581612. The cubic root of 139725198 is about 518.9094477099.

The spelling of 139725198 in words is "one hundred thirty-nine million, seven hundred twenty-five thousand, one hundred ninety-eight".