1231375853 has 2 divisors, whose sum is σ = 1231375854. Its totient is φ = 1231375852.

The previous prime is 1231375819. The next prime is 1231375867. The reversal of 1231375853 is 3585731321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 959884324 + 271491529 = 30982^2 + 16477^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231375853 - 2⁸ = 1231375597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231371853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615687926 + 615687927.

It is an arithmetic number, because the mean of its divisors is an integer number (615687927).

Almost surely, 2^1231375853 is an apocalyptic number.

It is an amenable number.

1231375853 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231375853 is an equidigital number, since it uses as much as digits as its factorization.

1231375853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 38.

The square root of 1231375853 is about 35090.9654042177. The cubic root of 1231375853 is about 1071.8406183024.

The spelling of 1231375853 in words is "one billion, two hundred thirty-one million, three hundred seventy-five thousand, eight hundred fifty-three".