10856399 has 2 divisors, whose sum is σ = 10856400. Its totient is φ = 10856398.

The previous prime is 10856369. The next prime is 10856401. The reversal of 10856399 is 99365801.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10856399 - 2²⁰ = 9807823 is a prime.

It is a super-2 number, since 2×10856399² = 235722798494402, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 10856401, 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 (10856359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5428199 + 5428200.

It is an arithmetic number, because the mean of its divisors is an integer number (5428200).

Almost surely, 2^10856399 is an apocalyptic number.

10856399 is a deficient number, since it is larger than the sum of its proper divisors (1).

10856399 is an equidigital number, since it uses as much as digits as its factorization.

10856399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 10856399 is about 3294.9050062179. The cubic root of 10856399 is about 221.4259918831.

The spelling of 10856399 in words is "ten million, eight hundred fifty-six thousand, three hundred ninety-nine".