551786941 has 2 divisors, whose sum is σ = 551786942. Its totient is φ = 551786940.

The previous prime is 551786929. The next prime is 551786981. The reversal of 551786941 is 149687155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 388484100 + 163302841 = 19710^2 + 12779^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551786941 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 551786891 and 551786900.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551786981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275893470 + 275893471.

It is an arithmetic number, because the mean of its divisors is an integer number (275893471).

Almost surely, 2^551786941 is an apocalyptic number.

It is an amenable number.

551786941 is a deficient number, since it is larger than the sum of its proper divisors (1).

551786941 is an equidigital number, since it uses as much as digits as its factorization.

551786941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 46.

The square root of 551786941 is about 23490.1456147041. The cubic root of 551786941 is about 820.2076318352.

The spelling of 551786941 in words is "five hundred fifty-one million, seven hundred eighty-six thousand, nine hundred forty-one".