10399279 has 4 divisors (see below), whose sum is σ = 11344680. Its totient is φ = 9453880.

The previous prime is 10399261. The next prime is 10399297. The reversal of 10399279 is 97299301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97299301 = 11 ⋅8845391.

It is an interprime number because it is at equal distance from previous prime (10399261) and next prime (10399297).

It is a cyclic number.

It is not a de Polignac number, because 10399279 - 2¹⁷ = 10268207 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10391279) 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, 472684 + ... + 472705.

It is an arithmetic number, because the mean of its divisors is an integer number (2836170).

Almost surely, 2^10399279 is an apocalyptic number.

10399279 is a deficient number, since it is larger than the sum of its proper divisors (945401).

10399279 is an equidigital number, since it uses as much as digits as its factorization.

10399279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945400.

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 10399279 is about 3224.7913110774. The cubic root of 10399279 is about 218.2735323016.

The spelling of 10399279 in words is "ten million, three hundred ninety-nine thousand, two hundred seventy-nine".