7981911 has 48 divisors (see below), whose sum is σ = 14030848. Its totient is φ = 4276800.

The previous prime is 7981907. The next prime is 7981927. The reversal of 7981911 is 1191897.

It is not a de Polignac number, because 7981911 - 2² = 7981907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7981411) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 119100 + ... + 119166.

Almost surely, 2^7981911 is an apocalyptic number.

7981911 is a deficient number, since it is larger than the sum of its proper divisors (6048937).

7981911 is a wasteful number, since it uses less digits than its factorization.

7981911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 169 counting only the distinct ones).

The product of its digits is 4536, while the sum is 36.

The square root of 7981911 is about 2825.2276014509. The cubic root of 7981911 is about 199.8491445751.

The spelling of 7981911 in words is "seven million, nine hundred eighty-one thousand, nine hundred eleven".