1231943093 has 2 divisors, whose sum is σ = 1231943094. Its totient is φ = 1231943092.

The previous prime is 1231943087. The next prime is 1231943107. The reversal of 1231943093 is 3903491321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1070729284 + 161213809 = 32722^2 + 12697^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231943093 - 2¹² = 1231938997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231943023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615971546 + 615971547.

It is an arithmetic number, because the mean of its divisors is an integer number (615971547).

Almost surely, 2^1231943093 is an apocalyptic number.

It is an amenable number.

1231943093 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231943093 is an equidigital number, since it uses as much as digits as its factorization.

1231943093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 1231943093 is about 35099.0468958916. The cubic root of 1231943093 is about 1072.0051761116.

The spelling of 1231943093 in words is "one billion, two hundred thirty-one million, nine hundred forty-three thousand, ninety-three".