139196231 has 4 divisors (see below), whose sum is σ = 143686464. Its totient is φ = 134706000.

The previous prime is 139196209. The next prime is 139196249. The reversal of 139196231 is 132691931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 139196231 - 2¹⁰ = 139195207 is a prime.

It is a super-2 number, since 2×139196231² = 38751181449210722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139196191 and 139196200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139196251) 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, 2245070 + ... + 2245131.

It is an arithmetic number, because the mean of its divisors is an integer number (35921616).

Almost surely, 2^139196231 is an apocalyptic number.

139196231 is a deficient number, since it is larger than the sum of its proper divisors (4490233).

139196231 is an equidigital number, since it uses as much as digits as its factorization.

139196231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4490232.

The product of its digits is 8748, while the sum is 35.

The square root of 139196231 is about 11798.1452355868. The cubic root of 139196231 is about 518.2537962644.

The spelling of 139196231 in words is "one hundred thirty-nine million, one hundred ninety-six thousand, two hundred thirty-one".