56147903 has 4 divisors (see below), whose sum is σ = 64169040. Its totient is φ = 48126768.

The previous prime is 56147893. The next prime is 56147911. The reversal of 56147903 is 30974165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30974165 = 5 ⋅6194833.

It is a cyclic number.

It is not a de Polignac number, because 56147903 - 2⁴ = 56147887 is a prime.

It is a super-2 number, since 2×56147903² = 6305174022594818, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56147303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4010558 + ... + 4010571.

It is an arithmetic number, because the mean of its divisors is an integer number (16042260).

Almost surely, 2^56147903 is an apocalyptic number.

56147903 is a deficient number, since it is larger than the sum of its proper divisors (8021137).

56147903 is an equidigital number, since it uses as much as digits as its factorization.

56147903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8021136.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 56147903 is about 7493.1904419947. The cubic root of 56147903 is about 382.9227598195.

The spelling of 56147903 in words is "fifty-six million, one hundred forty-seven thousand, nine hundred three".