56378617 has 2 divisors, whose sum is σ = 56378618. Its totient is φ = 56378616.

The previous prime is 56378573. The next prime is 56378627. The reversal of 56378617 is 71687365.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42458256 + 13920361 = 6516^2 + 3731^2 .

It is a cyclic number.

It is not a de Polignac number, because 56378617 - 2⁷ = 56378489 is a prime.

It is a super-3 number, since 3×56378617³ (a number of 24 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (56378627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28189308 + 28189309.

It is an arithmetic number, because the mean of its divisors is an integer number (28189309).

Almost surely, 2^56378617 is an apocalyptic number.

It is an amenable number.

56378617 is a deficient number, since it is larger than the sum of its proper divisors (1).

56378617 is an equidigital number, since it uses as much as digits as its factorization.

56378617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 43.

The square root of 56378617 is about 7508.5695708304. The cubic root of 56378617 is about 383.4465247754.

The spelling of 56378617 in words is "fifty-six million, three hundred seventy-eight thousand, six hundred seventeen".