1023140343949 has 2 divisors, whose sum is σ = 1023140343950. Its totient is φ = 1023140343948.

The previous prime is 1023140343931. The next prime is 1023140344007. The reversal of 1023140343949 is 9493430413201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 516360090724 + 506780253225 = 718582^2 + 711885^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1023140343949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1023140743949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511570171974 + 511570171975.

It is an arithmetic number, because the mean of its divisors is an integer number (511570171975).

Almost surely, 2^{1023140343949} is an apocalyptic number.

It is an amenable number.

1023140343949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023140343949 is an equidigital number, since it uses as much as digits as its factorization.

1023140343949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 43.

The spelling of 1023140343949 in words is "one trillion, twenty-three billion, one hundred forty million, three hundred forty-three thousand, nine hundred forty-nine".