139322191 has 4 divisors (see below), whose sum is σ = 147517632. Its totient is φ = 131126752.

The previous prime is 139322189. The next prime is 139322207. The reversal of 139322191 is 191223931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 191223931 = 229 ⋅835039.

It is a cyclic number.

It is not a de Polignac number, because 139322191 - 2¹ = 139322189 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 (139322101) 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, 4097695 + ... + 4097728.

It is an arithmetic number, because the mean of its divisors is an integer number (36879408).

Almost surely, 2^139322191 is an apocalyptic number.

139322191 is a deficient number, since it is larger than the sum of its proper divisors (8195441).

139322191 is an equidigital number, since it uses as much as digits as its factorization.

139322191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8195440.

The product of its digits is 2916, while the sum is 31.

The square root of 139322191 is about 11803.4821557030. The cubic root of 139322191 is about 518.4100734064.

The spelling of 139322191 in words is "one hundred thirty-nine million, three hundred twenty-two thousand, one hundred ninety-one".