56128703 has 2 divisors, whose sum is σ = 56128704. Its totient is φ = 56128702.

The previous prime is 56128697. The next prime is 56128727. The reversal of 56128703 is 30782165.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56128703 - 2⁸ = 56128447 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is equal to p_3345593 and since 56128703 and 3345593 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56128703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56128783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28064351 + 28064352.

It is an arithmetic number, because the mean of its divisors is an integer number (28064352).

Almost surely, 2^56128703 is an apocalyptic number.

56128703 is a deficient number, since it is larger than the sum of its proper divisors (1).

56128703 is an equidigital number, since it uses as much as digits as its factorization.

56128703 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 56128703 is about 7491.9091692305. The cubic root of 56128703 is about 382.8791075203.

The spelling of 56128703 in words is "fifty-six million, one hundred twenty-eight thousand, seven hundred three".