10399863 has 4 divisors (see below), whose sum is σ = 13866488. Its totient is φ = 6933240.

The previous prime is 10399853. The next prime is 10399877. The reversal of 10399863 is 36899301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36899301 = 3 ⋅12299767.

It is not a de Polignac number, because 10399863 - 2⁴ = 10399847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10399843) 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, 1733308 + ... + 1733313.

It is an arithmetic number, because the mean of its divisors is an integer number (3466622).

Almost surely, 2^10399863 is an apocalyptic number.

10399863 is a deficient number, since it is larger than the sum of its proper divisors (3466625).

10399863 is an equidigital number, since it uses as much as digits as its factorization.

10399863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3466624.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 10399863 is about 3224.8818583012. The cubic root of 10399863 is about 218.2776181412.

The spelling of 10399863 in words is "ten million, three hundred ninety-nine thousand, eight hundred sixty-three".