1146821563 has 2 divisors, whose sum is σ = 1146821564. Its totient is φ = 1146821562.

The previous prime is 1146821539. The next prime is 1146821597. The reversal of 1146821563 is 3651286411.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1146821563 - 2⁵ = 1146821531 is a prime.

It is not a weakly prime, because it can be changed into another prime (1146821063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 573410781 + 573410782.

It is an arithmetic number, because the mean of its divisors is an integer number (573410782).

Almost surely, 2^1146821563 is an apocalyptic number.

1146821563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1146821563 is an equidigital number, since it uses as much as digits as its factorization.

1146821563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 37.

The square root of 1146821563 is about 33864.7539929054. The cubic root of 1146821563 is about 1046.7234407495.

The spelling of 1146821563 in words is "one billion, one hundred forty-six million, eight hundred twenty-one thousand, five hundred sixty-three".