10204639 has 4 divisors (see below), whose sum is σ = 10214424. Its totient is φ = 10194856.

The previous prime is 10204633. The next prime is 10204643. The reversal of 10204639 is 93640201.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 93640201 = 79 ⋅1185319.

It is a cyclic number.

It is not a de Polignac number, because 10204639 - 2¹⁵ = 10171871 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 (10204633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3112 + ... + 5485.

It is an arithmetic number, because the mean of its divisors is an integer number (2553606).

Almost surely, 2^10204639 is an apocalyptic number.

10204639 is a deficient number, since it is larger than the sum of its proper divisors (9785).

10204639 is an equidigital number, since it uses as much as digits as its factorization.

10204639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9784.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 10204639 is about 3194.4700655977. The cubic root of 10204639 is about 216.9031613612.

The spelling of 10204639 in words is "ten million, two hundred four thousand, six hundred thirty-nine".