61648733 has 2 divisors, whose sum is σ = 61648734. Its totient is φ = 61648732.

The previous prime is 61648729. The next prime is 61648759. The reversal of 61648733 is 33784616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38962564 + 22686169 = 6242^2 + 4763^2 .

It is a cyclic number.

It is not a de Polignac number, because 61648733 - 2² = 61648729 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61648703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30824366 + 30824367.

It is an arithmetic number, because the mean of its divisors is an integer number (30824367).

Almost surely, 2^61648733 is an apocalyptic number.

It is an amenable number.

61648733 is a deficient number, since it is larger than the sum of its proper divisors (1).

61648733 is an equidigital number, since it uses as much as digits as its factorization.

61648733 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 38.

The square root of 61648733 is about 7851.6707139309. The cubic root of 61648733 is about 395.0402843068.

The spelling of 61648733 in words is "sixty-one million, six hundred forty-eight thousand, seven hundred thirty-three".