55740691 has 2 divisors, whose sum is σ = 55740692. Its totient is φ = 55740690.

The previous prime is 55740679. The next prime is 55740721. The reversal of 55740691 is 19604755.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55740691 - 2⁷ = 55740563 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55740691.

It is not a weakly prime, because it can be changed into another prime (55740491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27870345 + 27870346.

It is an arithmetic number, because the mean of its divisors is an integer number (27870346).

Almost surely, 2^55740691 is an apocalyptic number.

55740691 is a deficient number, since it is larger than the sum of its proper divisors (1).

55740691 is an equidigital number, since it uses as much as digits as its factorization.

55740691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 55740691 is about 7465.9688587617. The cubic root of 55740691 is about 381.9947985915.

The spelling of 55740691 in words is "fifty-five million, seven hundred forty thousand, six hundred ninety-one".