55239637 has 2 divisors, whose sum is σ = 55239638. Its totient is φ = 55239636.

The previous prime is 55239607. The next prime is 55239659. The reversal of 55239637 is 73693255.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53494596 + 1745041 = 7314^2 + 1321^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55239637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55239637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55239607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27619818 + 27619819.

It is an arithmetic number, because the mean of its divisors is an integer number (27619819).

Almost surely, 2^55239637 is an apocalyptic number.

It is an amenable number.

55239637 is a deficient number, since it is larger than the sum of its proper divisors (1).

55239637 is an equidigital number, since it uses as much as digits as its factorization.

55239637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 170100, while the sum is 40.

The square root of 55239637 is about 7432.3372501522. The cubic root of 55239637 is about 380.8467659247.

The spelling of 55239637 in words is "fifty-five million, two hundred thirty-nine thousand, six hundred thirty-seven".