10978421 has 2 divisors, whose sum is σ = 10978422. Its totient is φ = 10978420.

The previous prime is 10978391. The next prime is 10978423. The reversal of 10978421 is 12487901.

10978421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10797796 + 180625 = 3286^2 + 425^2 .

It is an emirp because it is prime and its reverse (12487901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10978421 - 2¹⁴ = 10962037 is a prime.

Together with 10978423, 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 (10978423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5489210 + 5489211.

It is an arithmetic number, because the mean of its divisors is an integer number (5489211).

Almost surely, 2^10978421 is an apocalyptic number.

It is an amenable number.

10978421 is a deficient number, since it is larger than the sum of its proper divisors (1).

10978421 is an equidigital number, since it uses as much as digits as its factorization.

10978421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 10978421 is about 3313.3700366847. The cubic root of 10978421 is about 222.2524857765.

The spelling of 10978421 in words is "ten million, nine hundred seventy-eight thousand, four hundred twenty-one".