76981947 has 8 divisors (see below), whose sum is σ = 117305856. Its totient is φ = 43989672.

The previous prime is 76981937. The next prime is 76981973. The reversal of 76981947 is 74918967.

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

It is not a de Polignac number, because 76981947 - 2⁸ = 76981691 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 76981947.

It is not an unprimeable number, because it can be changed into a prime (76981937) 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, 1832883 + ... + 1832924.

It is an arithmetic number, because the mean of its divisors is an integer number (14663232).

Almost surely, 2^76981947 is an apocalyptic number.

76981947 is a deficient number, since it is larger than the sum of its proper divisors (40323909).

76981947 is a wasteful number, since it uses less digits than its factorization.

76981947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3665817.

The product of its digits is 762048, while the sum is 51.

The square root of 76981947 is about 8773.9356619478. The cubic root of 76981947 is about 425.3988357506.

The spelling of 76981947 in words is "seventy-six million, nine hundred eighty-one thousand, nine hundred forty-seven".