7681947 has 32 divisors (see below), whose sum is σ = 13278720. Its totient is φ = 3836160.

The previous prime is 7681939. The next prime is 7681969. The reversal of 7681947 is 7491867.

It is not a de Polignac number, because 7681947 - 2³ = 7681939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7681899 and 7681908.

It is not an unprimeable number, because it can be changed into a prime (7681937) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4447 + ... + 5927.

It is an arithmetic number, because the mean of its divisors is an integer number (414960).

Almost surely, 2^7681947 is an apocalyptic number.

7681947 is a deficient number, since it is larger than the sum of its proper divisors (5596773).

7681947 is a wasteful number, since it uses less digits than its factorization.

7681947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1523.

The product of its digits is 84672, while the sum is 42.

The square root of 7681947 is about 2771.6325514036. The cubic root of 7681947 is about 197.3136371589.

The spelling of 7681947 in words is "seven million, six hundred eighty-one thousand, nine hundred forty-seven".