56786381 has 2 divisors, whose sum is σ = 56786382. Its totient is φ = 56786380.

The previous prime is 56786371. The next prime is 56786407. The reversal of 56786381 is 18368765.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40513225 + 16273156 = 6365^2 + 4034^2 .

It is a cyclic number.

It is not a de Polignac number, because 56786381 - 2²² = 52592077 is a prime.

It is a super-2 number, since 2×56786381² = 6449386134154322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56786351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28393190 + 28393191.

It is an arithmetic number, because the mean of its divisors is an integer number (28393191).

Almost surely, 2^56786381 is an apocalyptic number.

It is an amenable number.

56786381 is a deficient number, since it is larger than the sum of its proper divisors (1).

56786381 is an equidigital number, since it uses as much as digits as its factorization.

56786381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 44.

The square root of 56786381 is about 7535.6738915640. The cubic root of 56786381 is about 384.3687434679.

The spelling of 56786381 in words is "fifty-six million, seven hundred eighty-six thousand, three hundred eighty-one".