734806561 has 2 divisors, whose sum is σ = 734806562. Its totient is φ = 734806560.

The previous prime is 734806543. The next prime is 734806603. The reversal of 734806561 is 165608437.

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., 689325025 + 45481536 = 26255^2 + 6744^2 .

It is a cyclic number.

It is not a de Polignac number, because 734806561 - 2¹³ = 734798369 is a prime.

It is not a weakly prime, because it can be changed into another prime (734806531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 367403280 + 367403281.

It is an arithmetic number, because the mean of its divisors is an integer number (367403281).

Almost surely, 2^734806561 is an apocalyptic number.

It is an amenable number.

734806561 is a deficient number, since it is larger than the sum of its proper divisors (1).

734806561 is an equidigital number, since it uses as much as digits as its factorization.

734806561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 734806561 is about 27107.3156361894. The cubic root of 734806561 is about 902.3832149128.

The spelling of 734806561 in words is "seven hundred thirty-four million, eight hundred six thousand, five hundred sixty-one".