787187449 has 2 divisors, whose sum is σ = 787187450. Its totient is φ = 787187448.

The previous prime is 787187447. The next prime is 787187459. The reversal of 787187449 is 944781787.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 660849849 + 126337600 = 25707^2 + 11240^2 .

It is a cyclic number.

It is not a de Polignac number, because 787187449 - 2¹ = 787187447 is a prime.

Together with 787187447, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 787187449.

It is not a weakly prime, because it can be changed into another prime (787187447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 393593724 + 393593725.

It is an arithmetic number, because the mean of its divisors is an integer number (393593725).

Almost surely, 2^787187449 is an apocalyptic number.

It is an amenable number.

787187449 is a deficient number, since it is larger than the sum of its proper divisors (1).

787187449 is an equidigital number, since it uses as much as digits as its factorization.

787187449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3161088, while the sum is 55.

The square root of 787187449 is about 28056.8609969113. The cubic root of 787187449 is about 923.3351886762.

The spelling of 787187449 in words is "seven hundred eighty-seven million, one hundred eighty-seven thousand, four hundred forty-nine".