10556389 has 2 divisors, whose sum is σ = 10556390. Its totient is φ = 10556388.

The previous prime is 10556387. The next prime is 10556401. The reversal of 10556389 is 98365501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10144225 + 412164 = 3185^2 + 642^2 .

It is a cyclic number.

It is not a de Polignac number, because 10556389 - 2¹ = 10556387 is a prime.

It is a super-2 number, since 2×10556389² = 222874697438642, which contains 22 as substring.

Together with 10556387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10556387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5278194 + 5278195.

It is an arithmetic number, because the mean of its divisors is an integer number (5278195).

Almost surely, 2^10556389 is an apocalyptic number.

It is an amenable number.

10556389 is a deficient number, since it is larger than the sum of its proper divisors (1).

10556389 is an equidigital number, since it uses as much as digits as its factorization.

10556389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 10556389 is about 3249.0597101315. The cubic root of 10556389 is about 219.3672521296.

The spelling of 10556389 in words is "ten million, five hundred fifty-six thousand, three hundred eighty-nine".