1231348169 has 4 divisors (see below), whose sum is σ = 1231418880. Its totient is φ = 1231277460.

The previous prime is 1231348109. The next prime is 1231348187. The reversal of 1231348169 is 9618431321.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9618431321 = 70717 ⋅136013.

It is a cyclic number.

It is not a de Polignac number, because 1231348169 - 2¹² = 1231344073 is a prime.

It is a super-2 number, since 2×1231348169² = 3032436626599305122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1231348109) 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, 11204 + ... + 50874.

It is an arithmetic number, because the mean of its divisors is an integer number (307854720).

Almost surely, 2^1231348169 is an apocalyptic number.

It is an amenable number.

1231348169 is a deficient number, since it is larger than the sum of its proper divisors (70711).

1231348169 is an equidigital number, since it uses as much as digits as its factorization.

1231348169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70710.

The product of its digits is 31104, while the sum is 38.

The square root of 1231348169 is about 35090.5709414937. The cubic root of 1231348169 is about 1071.8325858082.

The spelling of 1231348169 in words is "one billion, two hundred thirty-one million, three hundred forty-eight thousand, one hundred sixty-nine".