7776997 has 4 divisors (see below), whose sum is σ = 7875520. Its totient is φ = 7678476.

The previous prime is 7776983. The next prime is 7777009. The reversal of 7776997 is 7996777.

7776997 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7776997 is a prime.

It is a Duffinian number.

7776997 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7776907) 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, 49143 + ... + 49300.

It is an arithmetic number, because the mean of its divisors is an integer number (1968880).

Almost surely, 2^7776997 is an apocalyptic number.

It is an amenable number.

7776997 is a deficient number, since it is larger than the sum of its proper divisors (98523).

7776997 is an equidigital number, since it uses as much as digits as its factorization.

7776997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98522.

The product of its digits is 1166886, while the sum is 52.

The square root of 7776997 is about 2788.7267704098. The cubic root of 7776997 is about 198.1241017052.

The spelling of 7776997 in words is "seven million, seven hundred seventy-six thousand, nine hundred ninety-seven".