551806679 has 2 divisors, whose sum is σ = 551806680. Its totient is φ = 551806678.

The previous prime is 551806663. The next prime is 551806681. The reversal of 551806679 is 976608155.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 551806679 - 2⁴ = 551806663 is a prime.

It is a super-2 number, since 2×551806679² = 608981221978018082, which contains 22 as substring.

Together with 551806681, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551806609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275903339 + 275903340.

It is an arithmetic number, because the mean of its divisors is an integer number (275903340).

Almost surely, 2^551806679 is an apocalyptic number.

551806679 is a deficient number, since it is larger than the sum of its proper divisors (1).

551806679 is an equidigital number, since it uses as much as digits as its factorization.

551806679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 453600, while the sum is 47.

The square root of 551806679 is about 23490.5657445707. The cubic root of 551806679 is about 820.2174116156.

The spelling of 551806679 in words is "five hundred fifty-one million, eight hundred six thousand, six hundred seventy-nine".