55623761 has 2 divisors, whose sum is σ = 55623762. Its totient is φ = 55623760.

The previous prime is 55623749. The next prime is 55623809. The reversal of 55623761 is 16732655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48094225 + 7529536 = 6935^2 + 2744^2 .

It is a cyclic number.

It is not a de Polignac number, because 55623761 - 2¹⁰ = 55622737 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (55623721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27811880 + 27811881.

It is an arithmetic number, because the mean of its divisors is an integer number (27811881).

Almost surely, 2^55623761 is an apocalyptic number.

It is an amenable number.

55623761 is a deficient number, since it is larger than the sum of its proper divisors (1).

55623761 is an equidigital number, since it uses as much as digits as its factorization.

55623761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 35.

The square root of 55623761 is about 7458.1338818769. The cubic root of 55623761 is about 381.7275018131.

The spelling of 55623761 in words is "fifty-five million, six hundred twenty-three thousand, seven hundred sixty-one".