56820047 has 2 divisors, whose sum is σ = 56820048. Its totient is φ = 56820046.

The previous prime is 56819911. The next prime is 56820073. The reversal of 56820047 is 74002865.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56820047 - 2¹² = 56815951 is a prime.

It is a super-3 number, since 3×56820047³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 56819995 and 56820022.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56820347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28410023 + 28410024.

It is an arithmetic number, because the mean of its divisors is an integer number (28410024).

Almost surely, 2^56820047 is an apocalyptic number.

56820047 is a deficient number, since it is larger than the sum of its proper divisors (1).

56820047 is an equidigital number, since it uses as much as digits as its factorization.

56820047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 56820047 is about 7537.9073355939. The cubic root of 56820047 is about 384.4446865698. Note that the first 3 decimals are identical.

The spelling of 56820047 in words is "fifty-six million, eight hundred twenty thousand, forty-seven".