1213509763 has 2 divisors, whose sum is σ = 1213509764. Its totient is φ = 1213509762.

The previous prime is 1213509719. The next prime is 1213509767. The reversal of 1213509763 is 3679053121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1213509763 - 2¹³ = 1213501571 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213509767) 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, 606754881 + 606754882.

It is an arithmetic number, because the mean of its divisors is an integer number (606754882).

Almost surely, 2^1213509763 is an apocalyptic number.

1213509763 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213509763 is an equidigital number, since it uses as much as digits as its factorization.

1213509763 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 1213509763 is about 34835.4670271550. The cubic root of 1213509763 is about 1066.6315483338.

The spelling of 1213509763 in words is "one billion, two hundred thirteen million, five hundred nine thousand, seven hundred sixty-three".