55638347 has 2 divisors, whose sum is σ = 55638348. Its totient is φ = 55638346.

The previous prime is 55638313. The next prime is 55638367. The reversal of 55638347 is 74383655.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55638347 is a prime.

It is not a weakly prime, because it can be changed into another prime (55638307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27819173 + 27819174.

It is an arithmetic number, because the mean of its divisors is an integer number (27819174).

Almost surely, 2^55638347 is an apocalyptic number.

55638347 is a deficient number, since it is larger than the sum of its proper divisors (1).

55638347 is an equidigital number, since it uses as much as digits as its factorization.

55638347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 41.

The square root of 55638347 is about 7459.1116763325. Note that the first 3 decimals coincide. The cubic root of 55638347 is about 381.7608651973.

The spelling of 55638347 in words is "fifty-five million, six hundred thirty-eight thousand, three hundred forty-seven".