55137727 has 2 divisors, whose sum is σ = 55137728. Its totient is φ = 55137726.

The previous prime is 55137707. The next prime is 55137751. The reversal of 55137727 is 72773155.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55137727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55137707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27568863 + 27568864.

It is an arithmetic number, because the mean of its divisors is an integer number (27568864).

Almost surely, 2^55137727 is an apocalyptic number.

55137727 is a deficient number, since it is larger than the sum of its proper divisors (1).

55137727 is an equidigital number, since it uses as much as digits as its factorization.

55137727 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51450, while the sum is 37.

The square root of 55137727 is about 7425.4782337571. The cubic root of 55137727 is about 380.6124173766.

The spelling of 55137727 in words is "fifty-five million, one hundred thirty-seven thousand, seven hundred twenty-seven".