787898987 has 2 divisors, whose sum is σ = 787898988. Its totient is φ = 787898986.

The previous prime is 787898953. The next prime is 787899041. The reversal of 787898987 is 789898787.

It is a happy number.

787898987 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a weak prime.

It is an emirp because it is prime and its reverse (789898787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 787898987 - 2⁸ = 787898731 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 787898987.

It is not a weakly prime, because it can be changed into another prime (787891987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 393949493 + 393949494.

It is an arithmetic number, because the mean of its divisors is an integer number (393949494).

Almost surely, 2^787898987 is an apocalyptic number.

787898987 is a deficient number, since it is larger than the sum of its proper divisors (1).

787898987 is an equidigital number, since it uses as much as digits as its factorization.

787898987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113799168, while the sum is 71.

The square root of 787898987 is about 28069.5384180075. The cubic root of 787898987 is about 923.6133055014.

The spelling of 787898987 in words is "seven hundred eighty-seven million, eight hundred ninety-eight thousand, nine hundred eighty-seven".