551756489 has 2 divisors, whose sum is σ = 551756490. Its totient is φ = 551756488.

The previous prime is 551756473. The next prime is 551756503. The reversal of 551756489 is 984657155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 547934464 + 3822025 = 23408^2 + 1955^2 .

It is a cyclic number.

It is not a de Polignac number, because 551756489 - 2⁴ = 551756473 is a prime.

It is not a weakly prime, because it can be changed into another prime (551756419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275878244 + 275878245.

It is an arithmetic number, because the mean of its divisors is an integer number (275878245).

Almost surely, 2^551756489 is an apocalyptic number.

It is an amenable number.

551756489 is a deficient number, since it is larger than the sum of its proper divisors (1).

551756489 is an equidigital number, since it uses as much as digits as its factorization.

551756489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512000, while the sum is 50.

The square root of 551756489 is about 23489.4974190594. The cubic root of 551756489 is about 820.1925430268.

The spelling of 551756489 in words is "five hundred fifty-one million, seven hundred fifty-six thousand, four hundred eighty-nine".