56771717 has 2 divisors, whose sum is σ = 56771718. Its totient is φ = 56771716.

The previous prime is 56771699. The next prime is 56771749. The reversal of 56771717 is 71717765.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45576001 + 11195716 = 6751^2 + 3346^2 .

It is a cyclic number.

It is not a de Polignac number, because 56771717 - 2¹² = 56767621 is a prime.

It is a super-2 number, since 2×56771717² = 6446055702256178, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56779717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28385858 + 28385859.

It is an arithmetic number, because the mean of its divisors is an integer number (28385859).

Almost surely, 2^56771717 is an apocalyptic number.

It is an amenable number.

56771717 is a deficient number, since it is larger than the sum of its proper divisors (1).

56771717 is an equidigital number, since it uses as much as digits as its factorization.

56771717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72030, while the sum is 41.

The square root of 56771717 is about 7534.7008567029. The cubic root of 56771717 is about 384.3356553202.

The spelling of 56771717 in words is "fifty-six million, seven hundred seventy-one thousand, seven hundred seventeen".