10821939 has 8 divisors (see below), whose sum is σ = 14764992. Its totient is φ = 7046760.

The previous prime is 10821931. The next prime is 10821947. The reversal of 10821939 is 93912801.

It is an interprime number because it is at equal distance from previous prime (10821931) and next prime (10821947).

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

It is not a de Polignac number, because 10821939 - 2³ = 10821931 is a prime.

It is a super-2 number, since 2×10821939² = 234228727439442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10821931) 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, 41817 + ... + 42074.

It is an arithmetic number, because the mean of its divisors is an integer number (1845624).

Almost surely, 2^10821939 is an apocalyptic number.

10821939 is a deficient number, since it is larger than the sum of its proper divisors (3943053).

10821939 is an equidigital number, since it uses as much as digits as its factorization.

10821939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83937.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 10821939 is about 3289.6715641535. The cubic root of 10821939 is about 221.1914626970.

The spelling of 10821939 in words is "ten million, eight hundred twenty-one thousand, nine hundred thirty-nine".