56849917 has 2 divisors, whose sum is σ = 56849918. Its totient is φ = 56849916.

The previous prime is 56849893. The next prime is 56849959. The reversal of 56849917 is 71994865.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56715961 + 133956 = 7531^2 + 366^2 .

It is a cyclic number.

It is not a de Polignac number, because 56849917 - 2⁷ = 56849789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56849977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28424958 + 28424959.

It is an arithmetic number, because the mean of its divisors is an integer number (28424959).

Almost surely, 2^56849917 is an apocalyptic number.

It is an amenable number.

56849917 is a deficient number, since it is larger than the sum of its proper divisors (1).

56849917 is an equidigital number, since it uses as much as digits as its factorization.

56849917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 49.

The square root of 56849917 is about 7539.8883943995. Note that the first 3 decimals coincide. The cubic root of 56849917 is about 384.5120416187.

It can be divided in two parts, 568499 and 17, that added together give a square (568516 = 754²).

The spelling of 56849917 in words is "fifty-six million, eight hundred forty-nine thousand, nine hundred seventeen".