56749687 has 2 divisors, whose sum is σ = 56749688. Its totient is φ = 56749686.

The previous prime is 56749663. The next prime is 56749711. The reversal of 56749687 is 78694765.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (56749663) and next prime (56749711).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56749687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56749087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28374843 + 28374844.

It is an arithmetic number, because the mean of its divisors is an integer number (28374844).

Almost surely, 2^56749687 is an apocalyptic number.

56749687 is a deficient number, since it is larger than the sum of its proper divisors (1).

56749687 is an equidigital number, since it uses as much as digits as its factorization.

56749687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2540160, while the sum is 52.

The square root of 56749687 is about 7533.2388120914. The cubic root of 56749687 is about 384.2859356690.

The spelling of 56749687 in words is "fifty-six million, seven hundred forty-nine thousand, six hundred eighty-seven".