76997947 has 8 divisors (see below), whose sum is σ = 87798816. Its totient is φ = 66893952.

The previous prime is 76997939. The next prime is 76997983. The reversal of 76997947 is 74979967.

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 76997947 - 2³ = 76997939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 76997891 and 76997900.

It is not an unprimeable number, because it can be changed into a prime (76997447) 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, 173983 + ... + 174424.

It is an arithmetic number, because the mean of its divisors is an integer number (10974852).

Almost surely, 2^76997947 is an apocalyptic number.

76997947 is a deficient number, since it is larger than the sum of its proper divisors (10800869).

76997947 is a wasteful number, since it uses less digits than its factorization.

76997947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348437.

The product of its digits is 6001128, while the sum is 58.

The square root of 76997947 is about 8774.8474060806. The cubic root of 76997947 is about 425.4283054732.

The spelling of 76997947 in words is "seventy-six million, nine hundred ninety-seven thousand, nine hundred forty-seven".