10399643 has 8 divisors (see below), whose sum is σ = 10666560. Its totient is φ = 10134720.

The previous prime is 10399637. The next prime is 10399687. The reversal of 10399643 is 34699301.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10399643 - 2⁸ = 10399387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10399633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18953 + ... + 19493.

It is an arithmetic number, because the mean of its divisors is an integer number (1333320).

Almost surely, 2^10399643 is an apocalyptic number.

10399643 is a deficient number, since it is larger than the sum of its proper divisors (266917).

10399643 is an equidigital number, since it uses as much as digits as its factorization.

10399643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 10399643 is about 3224.8477483441. The cubic root of 10399643 is about 218.2760789730.

The spelling of 10399643 in words is "ten million, three hundred ninety-nine thousand, six hundred forty-three".