7788997 has 2 divisors, whose sum is σ = 7788998. Its totient is φ = 7788996.

The previous prime is 7788983. The next prime is 7789021. The reversal of 7788997 is 7998877.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5225796 + 2563201 = 2286^2 + 1601^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7788997 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7788097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3894498 + 3894499.

It is an arithmetic number, because the mean of its divisors is an integer number (3894499).

Almost surely, 2^7788997 is an apocalyptic number.

It is an amenable number.

7788997 is a deficient number, since it is larger than the sum of its proper divisors (1).

7788997 is an equidigital number, since it uses as much as digits as its factorization.

7788997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1778112, while the sum is 55.

The square root of 7788997 is about 2790.8774605848. The cubic root of 7788997 is about 198.2259519625.

The spelling of 7788997 in words is "seven million, seven hundred eighty-eight thousand, nine hundred ninety-seven".