1293985057 has 2 divisors, whose sum is σ = 1293985058. Its totient is φ = 1293985056.

The previous prime is 1293985031. The next prime is 1293985103. The reversal of 1293985057 is 7505893921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1221921936 + 72063121 = 34956^2 + 8489^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1293985057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1293985057.

It is not a weakly prime, because it can be changed into another prime (1293985457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 646992528 + 646992529.

It is an arithmetic number, because the mean of its divisors is an integer number (646992529).

Almost surely, 2^1293985057 is an apocalyptic number.

It is an amenable number.

1293985057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1293985057 is an equidigital number, since it uses as much as digits as its factorization.

1293985057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 680400, while the sum is 49.

The square root of 1293985057 is about 35972.0037946178. The cubic root of 1293985057 is about 1089.7070326183.

The spelling of 1293985057 in words is "one billion, two hundred ninety-three million, nine hundred eighty-five thousand, fifty-seven".