139272197 has 4 divisors (see below), whose sum is σ = 139896960. Its totient is φ = 138647436.

The previous prime is 139272193. The next prime is 139272229. The reversal of 139272197 is 791272931.

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: 791272931 = 257 ⋅3078883.

It is a cyclic number.

It is not a de Polignac number, because 139272197 - 2² = 139272193 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 (139272191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312047 + ... + 312492.

It is an arithmetic number, because the mean of its divisors is an integer number (34974240).

Almost surely, 2^139272197 is an apocalyptic number.

It is an amenable number.

139272197 is a deficient number, since it is larger than the sum of its proper divisors (624763).

139272197 is an equidigital number, since it uses as much as digits as its factorization.

139272197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624762.

The product of its digits is 47628, while the sum is 41.

The square root of 139272197 is about 11801.3642008032. The cubic root of 139272197 is about 518.3480576962.

The spelling of 139272197 in words is "one hundred thirty-nine million, two hundred seventy-two thousand, one hundred ninety-seven".