56980421 has 2 divisors, whose sum is σ = 56980422. Its totient is φ = 56980420.

The previous prime is 56980397. The next prime is 56980423. The reversal of 56980421 is 12408965.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30096196 + 26884225 = 5486^2 + 5185^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56980421 is a prime.

Together with 56980423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56980423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28490210 + 28490211.

It is an arithmetic number, because the mean of its divisors is an integer number (28490211).

Almost surely, 2^56980421 is an apocalyptic number.

It is an amenable number.

56980421 is a deficient number, since it is larger than the sum of its proper divisors (1).

56980421 is an equidigital number, since it uses as much as digits as its factorization.

56980421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 56980421 is about 7548.5376729536. The cubic root of 56980421 is about 384.8060438688.

The spelling of 56980421 in words is "fifty-six million, nine hundred eighty thousand, four hundred twenty-one".