56720743 has 2 divisors, whose sum is σ = 56720744. Its totient is φ = 56720742.

The previous prime is 56720711. The next prime is 56720779. The reversal of 56720743 is 34702765.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56720743 - 2⁵ = 56720711 is a prime.

It is equal to p_3378814 and since 56720743 and 3378814 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 56720699 and 56720708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56720243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28360371 + 28360372.

It is an arithmetic number, because the mean of its divisors is an integer number (28360372).

Almost surely, 2^56720743 is an apocalyptic number.

56720743 is a deficient number, since it is larger than the sum of its proper divisors (1).

56720743 is an equidigital number, since it uses as much as digits as its factorization.

56720743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 34.

The square root of 56720743 is about 7531.3174810255. The cubic root of 56720743 is about 384.2205922035.

The spelling of 56720743 in words is "fifty-six million, seven hundred twenty thousand, seven hundred forty-three".