787147649 has 2 divisors, whose sum is σ = 787147650. Its totient is φ = 787147648.

The previous prime is 787147619. The next prime is 787147661. The reversal of 787147649 is 946741787.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 784392049 + 2755600 = 28007^2 + 1660^2 .

It is a cyclic number.

It is not a de Polignac number, because 787147649 - 2²⁰ = 786099073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 787147649.

It is not a weakly prime, because it can be changed into another prime (787147619) 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, 393573824 + 393573825.

It is an arithmetic number, because the mean of its divisors is an integer number (393573825).

Almost surely, 2^787147649 is an apocalyptic number.

It is an amenable number.

787147649 is a deficient number, since it is larger than the sum of its proper divisors (1).

787147649 is an equidigital number, since it uses as much as digits as its factorization.

787147649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2370816, while the sum is 53.

The square root of 787147649 is about 28056.1517140181. The cubic root of 787147649 is about 923.3196272154.

The spelling of 787147649 in words is "seven hundred eighty-seven million, one hundred forty-seven thousand, six hundred forty-nine".