1231858853 has 2 divisors, whose sum is σ = 1231858854. Its totient is φ = 1231858852.

The previous prime is 1231858753. The next prime is 1231858877. The reversal of 1231858853 is 3588581321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 880783684 + 351075169 = 29678^2 + 18737^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1231858853 is a prime.

It is a nialpdrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231858753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615929426 + 615929427.

It is an arithmetic number, because the mean of its divisors is an integer number (615929427).

Almost surely, 2^1231858853 is an apocalyptic number.

It is an amenable number.

1231858853 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231858853 is an equidigital number, since it uses as much as digits as its factorization.

1231858853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 230400, while the sum is 44.

The square root of 1231858853 is about 35097.8468427908. The cubic root of 1231858853 is about 1071.9807410612.

The spelling of 1231858853 in words is "one billion, two hundred thirty-one million, eight hundred fifty-eight thousand, eight hundred fifty-three".