785000001 has 4 divisors (see below), whose sum is σ = 1046666672. Its totient is φ = 523333332.

The previous prime is 784999997. The next prime is 785000017. The reversal of 785000001 is 100000587.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 100000587 = 3 ⋅33333529.

It is not a de Polignac number, because 785000001 - 2² = 784999997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (785000401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130833331 + ... + 130833336.

It is an arithmetic number, because the mean of its divisors is an integer number (261666668).

Almost surely, 2^785000001 is an apocalyptic number.

It is an amenable number.

785000001 is a deficient number, since it is larger than the sum of its proper divisors (261666671).

785000001 is a wasteful number, since it uses less digits than its factorization.

785000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261666670.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 785000001 is about 28017.8514700896. The cubic root of 785000001 is about 922.4791361385.

Adding to 785000001 its reverse (100000587), we get a palindrome (885000588).

The spelling of 785000001 in words is "seven hundred eighty-five million, one", and thus it is an aban number.