56147239 has 2 divisors, whose sum is σ = 56147240. Its totient is φ = 56147238.

The previous prime is 56147191. The next prime is 56147269. The reversal of 56147239 is 93274165.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56147239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56147198 and 56147207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56147269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28073619 + 28073620.

It is an arithmetic number, because the mean of its divisors is an integer number (28073620).

Almost surely, 2^56147239 is an apocalyptic number.

56147239 is a deficient number, since it is larger than the sum of its proper divisors (1).

56147239 is an equidigital number, since it uses as much as digits as its factorization.

56147239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 37.

The square root of 56147239 is about 7493.1461349689. The cubic root of 56147239 is about 382.9212503436.

The spelling of 56147239 in words is "fifty-six million, one hundred forty-seven thousand, two hundred thirty-nine".