733561 has 2 divisors, whose sum is σ = 733562. Its totient is φ = 733560.

The previous prime is 733559. The next prime is 733591. The reversal of 733561 is 165337.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 525625 + 207936 = 725^2 + 456^2 .

It is a cyclic number.

It is not a de Polignac number, because 733561 - 2¹ = 733559 is a prime.

It is a super-2 number, since 2×733561² = 1076223481442, which contains 22 as substring.

Together with 733559, it forms a pair of twin primes.

It is a nialpdrome in base 15.

It is not a weakly prime, because it can be changed into another prime (733511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 366780 + 366781.

It is an arithmetic number, because the mean of its divisors is an integer number (366781).

2⁷³³⁵⁶¹ is an apocalyptic number.

It is an amenable number.

733561 is a deficient number, since it is larger than the sum of its proper divisors (1).

733561 is an equidigital number, since it uses as much as digits as its factorization.

733561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1890, while the sum is 25.

The square root of 733561 is about 856.4817569569. The cubic root of 733561 is about 90.1873053883.

Adding to 733561 its reverse (165337), we get a palindrome (898898).

It can be divided in two parts, 7335 and 61, that added together give a square (7396 = 86²).

The spelling of 733561 in words is "seven hundred thirty-three thousand, five hundred sixty-one".