56680139 has 2 divisors, whose sum is σ = 56680140. Its totient is φ = 56680138.

The previous prime is 56680103. The next prime is 56680157. The reversal of 56680139 is 93108665.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56680139 - 2¹⁶ = 56614603 is a prime.

It is a Chen prime.

It is equal to p_3376469 and since 56680139 and 3376469 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (56680639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28340069 + 28340070.

It is an arithmetic number, because the mean of its divisors is an integer number (28340070).

Almost surely, 2^56680139 is an apocalyptic number.

56680139 is a deficient number, since it is larger than the sum of its proper divisors (1).

56680139 is an equidigital number, since it uses as much as digits as its factorization.

56680139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 56680139 is about 7528.6213213310. The cubic root of 56680139 is about 384.1288878507.

The spelling of 56680139 in words is "fifty-six million, six hundred eighty thousand, one hundred thirty-nine".