5561779 has 2 divisors, whose sum is σ = 5561780. Its totient is φ = 5561778.

The previous prime is 5561719. The next prime is 5561819. The reversal of 5561779 is 9771655.

It is an a-pointer prime, because the next prime (5561819) can be obtained adding 5561779 to its sum of digits (40).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5561779 - 2²¹ = 3464627 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (5561719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2780889 + 2780890.

It is an arithmetic number, because the mean of its divisors is an integer number (2780890).

Almost surely, 2^5561779 is an apocalyptic number.

5561779 is a deficient number, since it is larger than the sum of its proper divisors (1).

5561779 is an equidigital number, since it uses as much as digits as its factorization.

5561779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 66150, while the sum is 40.

The square root of 5561779 is about 2358.3424263665. The cubic root of 5561779 is about 177.1758708166.

It can be divided in two parts, 55617 and 79, that added together give a square (55696 = 236²).

The spelling of 5561779 in words is "five million, five hundred sixty-one thousand, seven hundred seventy-nine".