55797727 has 2 divisors, whose sum is σ = 55797728. Its totient is φ = 55797726.

The previous prime is 55797697. The next prime is 55797743. The reversal of 55797727 is 72779755.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55797727 - 2¹¹ = 55795679 is a prime.

It is a super-2 number, since 2×55797727² = 6226772676733058, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55797787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27898863 + 27898864.

It is an arithmetic number, because the mean of its divisors is an integer number (27898864).

Almost surely, 2^55797727 is an apocalyptic number.

55797727 is a deficient number, since it is larger than the sum of its proper divisors (1).

55797727 is an equidigital number, since it uses as much as digits as its factorization.

55797727 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080450, while the sum is 49.

The square root of 55797727 is about 7469.7876141159. The cubic root of 55797727 is about 382.1250447241.

The spelling of 55797727 in words is "fifty-five million, seven hundred ninety-seven thousand, seven hundred twenty-seven".