551173669 has 2 divisors, whose sum is σ = 551173670. Its totient is φ = 551173668.

The previous prime is 551173657. The next prime is 551173673. The reversal of 551173669 is 966371155.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 495596644 + 55577025 = 22262^2 + 7455^2 .

It is a cyclic number.

It is not a de Polignac number, because 551173669 - 2¹³ = 551165477 is a prime.

It is a super-2 number, since 2×551173669² = 607584826797843122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551171669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275586834 + 275586835.

It is an arithmetic number, because the mean of its divisors is an integer number (275586835).

Almost surely, 2^551173669 is an apocalyptic number.

It is an amenable number.

551173669 is a deficient number, since it is larger than the sum of its proper divisors (1).

551173669 is an equidigital number, since it uses as much as digits as its factorization.

551173669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 170100, while the sum is 43.

The square root of 551173669 is about 23477.0881712362. The cubic root of 551173669 is about 819.9036516779.

The spelling of 551173669 in words is "five hundred fifty-one million, one hundred seventy-three thousand, six hundred sixty-nine".