7697978 has 8 divisors (see below), whose sum is σ = 11638272. Its totient is φ = 3818556.

The previous prime is 7697971. The next prime is 7697993. The reversal of 7697978 is 8797967.

It is a happy number.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7697971) 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, 14900 + ... + 15407.

It is an arithmetic number, because the mean of its divisors is an integer number (1454784).

Almost surely, 2^7697978 is an apocalyptic number.

7697978 is a deficient number, since it is larger than the sum of its proper divisors (3940294).

7697978 is a wasteful number, since it uses less digits than its factorization.

7697978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30436.

The product of its digits is 1333584, while the sum is 53.

The square root of 7697978 is about 2774.5230220706. The cubic root of 7697978 is about 197.4507958395.

The spelling of 7697978 in words is "seven million, six hundred ninety-seven thousand, nine hundred seventy-eight".