56121829 has 2 divisors, whose sum is σ = 56121830. Its totient is φ = 56121828.

The previous prime is 56121827. The next prime is 56121847. The reversal of 56121829 is 92812165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32092225 + 24029604 = 5665^2 + 4902^2 .

It is a cyclic number.

It is not a de Polignac number, because 56121829 - 2¹ = 56121827 is a prime.

Together with 56121827, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 56121794 and 56121803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56121823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28060914 + 28060915.

It is an arithmetic number, because the mean of its divisors is an integer number (28060915).

Almost surely, 2^56121829 is an apocalyptic number.

It is an amenable number.

56121829 is a deficient number, since it is larger than the sum of its proper divisors (1).

56121829 is an equidigital number, since it uses as much as digits as its factorization.

56121829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 34.

The square root of 56121829 is about 7491.4503936154. The cubic root of 56121829 is about 382.8634766678.

The spelling of 56121829 in words is "fifty-six million, one hundred twenty-one thousand, eight hundred twenty-nine".