7981947 has 12 divisors (see below), whose sum is σ = 11602344. Its totient is φ = 5287680.

The previous prime is 7981937. The next prime is 7981949. The reversal of 7981947 is 7491897.

It is not a de Polignac number, because 7981947 - 2⁷ = 7981819 is a prime.

It is a super-2 number, since 2×7981947² = 127422955821618, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7981949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1254 + ... + 4187.

It is an arithmetic number, because the mean of its divisors is an integer number (966862).

Almost surely, 2^7981947 is an apocalyptic number.

7981947 is a deficient number, since it is larger than the sum of its proper divisors (3620397).

7981947 is a wasteful number, since it uses less digits than its factorization.

7981947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5610 (or 5607 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 7981947 is about 2825.2339726118. The cubic root of 7981947 is about 199.8494450278.

The spelling of 7981947 in words is "seven million, nine hundred eighty-one thousand, nine hundred forty-seven".