55749893 has 2 divisors, whose sum is σ = 55749894. Its totient is φ = 55749892.

The previous prime is 55749853. The next prime is 55749899. The reversal of 55749893 is 39894755.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46881409 + 8868484 = 6847^2 + 2978^2 .

It is a cyclic number.

It is not a de Polignac number, because 55749893 - 2⁸ = 55749637 is a prime.

It is a super-2 number, since 2×55749893² = 6216101139022898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55749899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27874946 + 27874947.

It is an arithmetic number, because the mean of its divisors is an integer number (27874947).

Almost surely, 2^55749893 is an apocalyptic number.

It is an amenable number.

55749893 is a deficient number, since it is larger than the sum of its proper divisors (1).

55749893 is an equidigital number, since it uses as much as digits as its factorization.

55749893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1360800, while the sum is 50.

The square root of 55749893 is about 7466.5850962806. The cubic root of 55749893 is about 382.0158180817.

The spelling of 55749893 in words is "fifty-five million, seven hundred forty-nine thousand, eight hundred ninety-three".