1231352677 has 4 divisors (see below), whose sum is σ = 1231423200. Its totient is φ = 1231282156.

The previous prime is 1231352621. The next prime is 1231352699. The reversal of 1231352677 is 7762531321.

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.

It is a cyclic number.

It is not a de Polignac number, because 1231352677 - 2¹¹ = 1231350629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231353677) 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, 12438 + ... + 51160.

It is an arithmetic number, because the mean of its divisors is an integer number (307855800).

Almost surely, 2^1231352677 is an apocalyptic number.

It is an amenable number.

1231352677 is a deficient number, since it is larger than the sum of its proper divisors (70523).

1231352677 is an equidigital number, since it uses as much as digits as its factorization.

1231352677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70522.

The product of its digits is 52920, while the sum is 37.

The square root of 1231352677 is about 35090.6351752145. The cubic root of 1231352677 is about 1071.8338938096.

Adding to 1231352677 its reverse (7762531321), we get a palindrome (8993883998).

The spelling of 1231352677 in words is "one billion, two hundred thirty-one million, three hundred fifty-two thousand, six hundred seventy-seven".