8779391 has 2 divisors, whose sum is σ = 8779392. Its totient is φ = 8779390.

The previous prime is 8779321. The next prime is 8779403. The reversal of 8779391 is 1939778.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8779391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8779321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4389695 + 4389696.

It is an arithmetic number, because the mean of its divisors is an integer number (4389696).

Almost surely, 2^8779391 is an apocalyptic number.

8779391 is a deficient number, since it is larger than the sum of its proper divisors (1).

8779391 is an equidigital number, since it uses as much as digits as its factorization.

8779391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 95256, while the sum is 44.

The square root of 8779391 is about 2963.0037124513. The cubic root of 8779391 is about 206.2947284688.

The spelling of 8779391 in words is "eight million, seven hundred seventy-nine thousand, three hundred ninety-one".