789969987 has 12 divisors (see below), whose sum is σ = 1143720864. Its totient is φ = 525422160.

The previous prime is 789969977. The next prime is 789969989.

789969987 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 789969987 - 2¹⁸ = 789707843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (789969989) 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 in 11 ways as a sum of consecutive naturals, for example, 97948 + ... + 105705.

It is an arithmetic number, because the mean of its divisors is an integer number (95310072).

Almost surely, 2^789969987 is an apocalyptic number.

789969987 is a deficient number, since it is larger than the sum of its proper divisors (353750877).

789969987 is a wasteful number, since it uses less digits than its factorization.

789969987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204090 (or 204087 counting only the distinct ones).

The product of its digits is 123451776, while the sum is 72.

The square root of 789969987 is about 28106.4047327295. The cubic root of 789969987 is about 924.4218396282.

The spelling of 789969987 in words is "seven hundred eighty-nine million, nine hundred sixty-nine thousand, nine hundred eighty-seven".