76820747 has 8 divisors (see below), whose sum is σ = 79687344. Its totient is φ = 74003328.

The previous prime is 76820729. The next prime is 76820749. The reversal of 76820747 is 74702867.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 76820747 - 2⁶ = 76820683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76820749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9098 + ... + 15375.

It is an arithmetic number, because the mean of its divisors is an integer number (9960918).

Almost surely, 2^76820747 is an apocalyptic number.

76820747 is a deficient number, since it is larger than the sum of its proper divisors (2866597).

76820747 is a wasteful number, since it uses less digits than its factorization.

76820747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24589.

The product of its (nonzero) digits is 131712, while the sum is 41.

The square root of 76820747 is about 8764.7445484737. The cubic root of 76820747 is about 425.1017002292.

The spelling of 76820747 in words is "seventy-six million, eight hundred twenty thousand, seven hundred forty-seven".