1231322193 has 6 divisors (see below), whose sum is σ = 1778576514. Its totient is φ = 820881456.

The previous prime is 1231322177. The next prime is 1231322219. The reversal of 1231322193 is 3912231321.

It can be written as a sum of positive squares in only one way, i.e., 1231167744 + 154449 = 35088^2 + 393^2 .

It is not a de Polignac number, because 1231322193 - 2⁴ = 1231322177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231322173) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68406780 + ... + 68406797.

It is an arithmetic number, because the mean of its divisors is an integer number (296429419).

Almost surely, 2^1231322193 is an apocalyptic number.

It is an amenable number.

1231322193 is a deficient number, since it is larger than the sum of its proper divisors (547254321).

1231322193 is a wasteful number, since it uses less digits than its factorization.

1231322193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136813583 (or 136813580 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 1231322193 is about 35090.2008116226. The cubic root of 1231322193 is about 1071.8250487796.

The spelling of 1231322193 in words is "one billion, two hundred thirty-one million, three hundred twenty-two thousand, one hundred ninety-three".