1231134193 has 4 divisors (see below), whose sum is σ = 1231599168. Its totient is φ = 1230669220.

The previous prime is 1231134143. The next prime is 1231134221. The reversal of 1231134193 is 3914311321.

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.

It is a cyclic number.

It is not a de Polignac number, because 1231134193 - 2²¹ = 1229037041 is a prime.

It is a super-2 number, since 2×1231134193² = 3031382802347522498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231134143) 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, 228493 + ... + 233818.

It is an arithmetic number, because the mean of its divisors is an integer number (307899792).

Almost surely, 2^1231134193 is an apocalyptic number.

It is an amenable number.

1231134193 is a deficient number, since it is larger than the sum of its proper divisors (464975).

1231134193 is an equidigital number, since it uses as much as digits as its factorization.

1231134193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464974.

The product of its digits is 1944, while the sum is 28.

The square root of 1231134193 is about 35087.5218988175. The cubic root of 1231134193 is about 1071.7704967524.

It can be divided in two parts, 1231 and 134193, that added together give a square (135424 = 368²).

The spelling of 1231134193 in words is "one billion, two hundred thirty-one million, one hundred thirty-four thousand, one hundred ninety-three".