56121983 has 2 divisors, whose sum is σ = 56121984. Its totient is φ = 56121982.

The previous prime is 56121977. The next prime is 56122037. The reversal of 56121983 is 38912165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56121983 - 2¹⁶ = 56056447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56121943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28060991 + 28060992.

It is an arithmetic number, because the mean of its divisors is an integer number (28060992).

Almost surely, 2^56121983 is an apocalyptic number.

56121983 is a deficient number, since it is larger than the sum of its proper divisors (1).

56121983 is an equidigital number, since it uses as much as digits as its factorization.

56121983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 35.

The square root of 56121983 is about 7491.4606719918. The cubic root of 56121983 is about 382.8638268638.

The spelling of 56121983 in words is "fifty-six million, one hundred twenty-one thousand, nine hundred eighty-three".