827680747 has 4 divisors (see below), whose sum is σ = 828022816. Its totient is φ = 827338680.

The previous prime is 827680729. The next prime is 827680753. The reversal of 827680747 is 747086728.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 827680747 - 2¹¹ = 827678699 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 827680747.

It is not an unprimeable number, because it can be changed into a prime (827680247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167379 + ... + 172252.

It is an arithmetic number, because the mean of its divisors is an integer number (207005704).

Almost surely, 2^827680747 is an apocalyptic number.

827680747 is a deficient number, since it is larger than the sum of its proper divisors (342069).

827680747 is a wasteful number, since it uses less digits than its factorization.

827680747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342068.

The product of its (nonzero) digits is 1053696, while the sum is 49.

The square root of 827680747 is about 28769.4412006907. The cubic root of 827680747 is about 938.9034848741.

The spelling of 827680747 in words is "eight hundred twenty-seven million, six hundred eighty thousand, seven hundred forty-seven".