55742689 has 2 divisors, whose sum is σ = 55742690. Its totient is φ = 55742688.

The previous prime is 55742671. The next prime is 55742719. The reversal of 55742689 is 98624755.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49112064 + 6630625 = 7008^2 + 2575^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55742689 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55742189) 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, 27871344 + 27871345.

It is an arithmetic number, because the mean of its divisors is an integer number (27871345).

Almost surely, 2^55742689 is an apocalyptic number.

It is an amenable number.

55742689 is a deficient number, since it is larger than the sum of its proper divisors (1).

55742689 is an equidigital number, since it uses as much as digits as its factorization.

55742689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 604800, while the sum is 46.

The square root of 55742689 is about 7466.1026647107. The cubic root of 55742689 is about 381.9993626809. Note that the first 3 decimals are identical.

The spelling of 55742689 in words is "fifty-five million, seven hundred forty-two thousand, six hundred eighty-nine".