56789034721 has 2 divisors, whose sum is σ = 56789034722. Its totient is φ = 56789034720.

The previous prime is 56789034647. The next prime is 56789034727. The reversal of 56789034721 is 12743098765.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47203645696 + 9585389025 = 217264^2 + 97905^2 .

It is a cyclic number.

It is not a de Polignac number, because 56789034721 - 2⁹ = 56789034209 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is the 238305-th Hogben number.

It is not a weakly prime, because it can be changed into another prime (56789034727) by changing a digit.

It is a nontrivial repunit in base 238304.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28394517360 + 28394517361.

It is an arithmetic number, because the mean of its divisors is an integer number (28394517361).

It is a 2-persistent number, because it is pandigital, and so is 2⋅56789034721 = 113578069442, but 3⋅56789034721 = 170367104163 is not.

Almost surely, 2^56789034721 is an apocalyptic number.

It is an amenable number.

56789034721 is a deficient number, since it is larger than the sum of its proper divisors (1).

56789034721 is an equidigital number, since it uses as much as digits as its factorization.

56789034721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 56789034721 in words is "fifty-six billion, seven hundred eighty-nine million, thirty-four thousand, seven hundred twenty-one".