1231468769 has 4 divisors (see below), whose sum is σ = 1271193600. Its totient is φ = 1191743940.

The previous prime is 1231468757. The next prime is 1231468879. The reversal of 1231468769 is 9678641321.

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 an emirpimes, since its reverse is a distinct semiprime: 9678641321 = 5297 ⋅1827193.

It is a cyclic number.

It is not a de Polignac number, because 1231468769 - 2²⁰ = 1230420193 is a prime.

It is a super-2 number, since 2×1231468769² = 3033030658044750722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231468739) 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, 19862369 + ... + 19862430.

It is an arithmetic number, because the mean of its divisors is an integer number (317798400).

Almost surely, 2^1231468769 is an apocalyptic number.

It is an amenable number.

1231468769 is a deficient number, since it is larger than the sum of its proper divisors (39724831).

1231468769 is an equidigital number, since it uses as much as digits as its factorization.

1231468769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39724830.

The product of its digits is 435456, while the sum is 47.

The square root of 1231468769 is about 35092.2893097615. The cubic root of 1231468769 is about 1071.8675769378.

The spelling of 1231468769 in words is "one billion, two hundred thirty-one million, four hundred sixty-eight thousand, seven hundred sixty-nine".