10399867 has 4 divisors (see below), whose sum is σ = 10546416. Its totient is φ = 10253320.

The previous prime is 10399853. The next prime is 10399877. The reversal of 10399867 is 76899301.

10399867 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76899301 = 1889 ⋅40709.

It is a cyclic number.

It is not a de Polignac number, because 10399867 - 2²³ = 2011259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10399847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73168 + ... + 73309.

It is an arithmetic number, because the mean of its divisors is an integer number (2636604).

Almost surely, 2^10399867 is an apocalyptic number.

10399867 is a deficient number, since it is larger than the sum of its proper divisors (146549).

10399867 is an equidigital number, since it uses as much as digits as its factorization.

10399867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146548.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 10399867 is about 3224.8824784789. The cubic root of 10399867 is about 218.2776461259.

The spelling of 10399867 in words is "ten million, three hundred ninety-nine thousand, eight hundred sixty-seven".