7981967 has 4 divisors (see below), whose sum is σ = 9122256. Its totient is φ = 6841680.

The previous prime is 7981949. The next prime is 7981999. The reversal of 7981967 is 7691897.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7981967 - 2⁸ = 7981711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7981907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 570134 + ... + 570147.

It is an arithmetic number, because the mean of its divisors is an integer number (2280564).

Almost surely, 2^7981967 is an apocalyptic number.

7981967 is a deficient number, since it is larger than the sum of its proper divisors (1140289).

7981967 is a wasteful number, since it uses less digits than its factorization.

7981967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140288.

The product of its digits is 190512, while the sum is 47.

The square root of 7981967 is about 2825.2375121395. The cubic root of 7981967 is about 199.8496119455.

The spelling of 7981967 in words is "seven million, nine hundred eighty-one thousand, nine hundred sixty-seven".