1923904210057 has 2 divisors, whose sum is σ = 1923904210058. Its totient is φ = 1923904210056.

The previous prime is 1923904210031. The next prime is 1923904210091. The reversal of 1923904210057 is 7500124093291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1773875033161 + 150029176896 = 1331869^2 + 387336^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1923904210057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1923904209995 and 1923904210022.

It is not a weakly prime, because it can be changed into another prime (1923904210027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 961952105028 + 961952105029.

It is an arithmetic number, because the mean of its divisors is an integer number (961952105029).

Almost surely, 2^{1923904210057} is an apocalyptic number.

It is an amenable number.

1923904210057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1923904210057 is an equidigital number, since it uses as much as digits as its factorization.

1923904210057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 43.

The spelling of 1923904210057 in words is "one trillion, nine hundred twenty-three billion, nine hundred four million, two hundred ten thousand, fifty-seven".