56778503 has 2 divisors, whose sum is σ = 56778504. Its totient is φ = 56778502.

The previous prime is 56778499. The next prime is 56778509. The reversal of 56778503 is 30587765.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56778503 - 2² = 56778499 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56778509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28389251 + 28389252.

It is an arithmetic number, because the mean of its divisors is an integer number (28389252).

Almost surely, 2^56778503 is an apocalyptic number.

56778503 is a deficient number, since it is larger than the sum of its proper divisors (1).

56778503 is an equidigital number, since it uses as much as digits as its factorization.

56778503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 176400, while the sum is 41.

The square root of 56778503 is about 7535.1511597313. The cubic root of 56778503 is about 384.3509680967.

The spelling of 56778503 in words is "fifty-six million, seven hundred seventy-eight thousand, five hundred three".