551000917 has 2 divisors, whose sum is σ = 551000918. Its totient is φ = 551000916.

The previous prime is 551000909. The next prime is 551000939. The reversal of 551000917 is 719000155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 399440196 + 151560721 = 19986^2 + 12311^2 .

It is a cyclic number.

It is not a de Polignac number, because 551000917 - 2³ = 551000909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551000977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275500458 + 275500459.

It is an arithmetic number, because the mean of its divisors is an integer number (275500459).

Almost surely, 2^551000917 is an apocalyptic number.

It is an amenable number.

551000917 is a deficient number, since it is larger than the sum of its proper divisors (1).

551000917 is an equidigital number, since it uses as much as digits as its factorization.

551000917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1575, while the sum is 28.

The square root of 551000917 is about 23473.4087213596. The cubic root of 551000917 is about 819.8179830983.

The spelling of 551000917 in words is "five hundred fifty-one million, nine hundred seventeen", and thus it is an aban number.