69493561 has 2 divisors, whose sum is σ = 69493562. Its totient is φ = 69493560.

The previous prime is 69493559. The next prime is 69493573. The reversal of 69493561 is 16539496.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50623225 + 18870336 = 7115^2 + 4344^2 .

It is a cyclic number.

It is not a de Polignac number, because 69493561 - 2¹ = 69493559 is a prime.

Together with 69493559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (69491561) 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, 34746780 + 34746781.

It is an arithmetic number, because the mean of its divisors is an integer number (34746781).

Almost surely, 2^69493561 is an apocalyptic number.

It is an amenable number.

69493561 is a deficient number, since it is larger than the sum of its proper divisors (1).

69493561 is an equidigital number, since it uses as much as digits as its factorization.

69493561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174960, while the sum is 43.

The square root of 69493561 is about 8336.2798057647. The cubic root of 69493561 is about 411.1322283582.

The spelling of 69493561 in words is "sixty-nine million, four hundred ninety-three thousand, five hundred sixty-one".