785920987 has 2 divisors, whose sum is σ = 785920988. Its totient is φ = 785920986.

The previous prime is 785920973. The next prime is 785921039. The reversal of 785920987 is 789029587.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 785920987 - 2⁷ = 785920859 is a prime.

It is not a weakly prime, because it can be changed into another prime (785920937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 392960493 + 392960494.

It is an arithmetic number, because the mean of its divisors is an integer number (392960494).

Almost surely, 2^785920987 is an apocalyptic number.

785920987 is a deficient number, since it is larger than the sum of its proper divisors (1).

785920987 is an equidigital number, since it uses as much as digits as its factorization.

785920987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2540160, while the sum is 55.

The square root of 785920987 is about 28034.2823521488. The cubic root of 785920987 is about 922.8397553868.

The spelling of 785920987 in words is "seven hundred eighty-five million, nine hundred twenty thousand, nine hundred eighty-seven".