55749719 has 2 divisors, whose sum is σ = 55749720. Its totient is φ = 55749718.

The previous prime is 55749679. The next prime is 55749731. The reversal of 55749719 is 91794755.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55749719 is a prime.

It is a super-2 number, since 2×55749719² = 6216062337157922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55749739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27874859 + 27874860.

It is an arithmetic number, because the mean of its divisors is an integer number (27874860).

Almost surely, 2^55749719 is an apocalyptic number.

55749719 is a deficient number, since it is larger than the sum of its proper divisors (1).

55749719 is an equidigital number, since it uses as much as digits as its factorization.

55749719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 396900, while the sum is 47.

The square root of 55749719 is about 7466.5734443585. The cubic root of 55749719 is about 382.0154206470.

The spelling of 55749719 in words is "fifty-five million, seven hundred forty-nine thousand, seven hundred nineteen".