56671739 has 2 divisors, whose sum is σ = 56671740. Its totient is φ = 56671738.

The previous prime is 56671709. The next prime is 56671777. The reversal of 56671739 is 93717665.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56671739 - 2²⁰ = 55623163 is a prime.

It is a Chen prime.

It is equal to p_3375998 and since 56671739 and 3375998 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56671739.

It is not a weakly prime, because it can be changed into another prime (56671709) 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, 28335869 + 28335870.

It is an arithmetic number, because the mean of its divisors is an integer number (28335870).

Almost surely, 2^56671739 is an apocalyptic number.

56671739 is a deficient number, since it is larger than the sum of its proper divisors (1).

56671739 is an equidigital number, since it uses as much as digits as its factorization.

56671739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 238140, while the sum is 44.

The square root of 56671739 is about 7528.0634295946. The cubic root of 56671739 is about 384.1099109385.

The spelling of 56671739 in words is "fifty-six million, six hundred seventy-one thousand, seven hundred thirty-nine".