5551729 has 2 divisors, whose sum is σ = 5551730. Its totient is φ = 5551728.

The previous prime is 5551709. The next prime is 5551753. The reversal of 5551729 is 9271555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4297329 + 1254400 = 2073^2 + 1120^2 .

It is a cyclic number.

It is not a de Polignac number, because 5551729 - 2¹¹ = 5549681 is a prime.

5551729 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 5551694 and 5551703.

It is not a weakly prime, because it can be changed into another prime (5551709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2775864 + 2775865.

It is an arithmetic number, because the mean of its divisors is an integer number (2775865).

Almost surely, 2^5551729 is an apocalyptic number.

It is an amenable number.

5551729 is a deficient number, since it is larger than the sum of its proper divisors (1).

5551729 is an equidigital number, since it uses as much as digits as its factorization.

5551729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15750, while the sum is 34.

The square root of 5551729 is about 2356.2107291157. The cubic root of 5551729 is about 177.0690889703.

The spelling of 5551729 in words is "five million, five hundred fifty-one thousand, seven hundred twenty-nine".