550991709 has 12 divisors (see below), whose sum is σ = 842693436. Its totient is φ = 345720192.

The previous prime is 550991687. The next prime is 550991713. The reversal of 550991709 is 907199055.

550991709 is a `hidden beast` number, since 550 + 9 + 91 + 7 + 0 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 390260025 + 160731684 = 19755^2 + 12678^2 .

It is not a de Polignac number, because 550991709 - 2¹¹ = 550989661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550991759) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1800474 + ... + 1800779.

It is an arithmetic number, because the mean of its divisors is an integer number (70224453).

Almost surely, 2^550991709 is an apocalyptic number.

It is an amenable number.

550991709 is a deficient number, since it is larger than the sum of its proper divisors (291701727).

550991709 is a wasteful number, since it uses less digits than its factorization.

550991709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3601276 (or 3601273 counting only the distinct ones).

The product of its (nonzero) digits is 127575, while the sum is 45.

The square root of 550991709 is about 23473.2125837091. The cubic root of 550991709 is about 819.8134163025.

The spelling of 550991709 in words is "five hundred fifty million, nine hundred ninety-one thousand, seven hundred nine".