55497749 has 2 divisors, whose sum is σ = 55497750. Its totient is φ = 55497748.

The previous prime is 55497713. The next prime is 55497763. The reversal of 55497749 is 94779455.

55497749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54982225 + 515524 = 7415^2 + 718^2 .

It is a cyclic number.

It is not a de Polignac number, because 55497749 - 2¹² = 55493653 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 55497697 and 55497706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55497709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27748874 + 27748875.

It is an arithmetic number, because the mean of its divisors is an integer number (27748875).

Almost surely, 2^55497749 is an apocalyptic number.

It is an amenable number.

55497749 is a deficient number, since it is larger than the sum of its proper divisors (1).

55497749 is an equidigital number, since it uses as much as digits as its factorization.

55497749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1587600, while the sum is 50.

The square root of 55497749 is about 7449.6811341157. The cubic root of 55497749 is about 381.4390242809.

The spelling of 55497749 in words is "fifty-five million, four hundred ninety-seven thousand, seven hundred forty-nine".