10821947 has 2 divisors, whose sum is σ = 10821948. Its totient is φ = 10821946.

The previous prime is 10821931. The next prime is 10821971. The reversal of 10821947 is 74912801.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10821947 - 2⁴ = 10821931 is a prime.

It is a super-2 number, since 2×10821947² = 234229073741618, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (10821917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5410973 + 5410974.

It is an arithmetic number, because the mean of its divisors is an integer number (5410974).

Almost surely, 2^10821947 is an apocalyptic number.

10821947 is a deficient number, since it is larger than the sum of its proper divisors (1).

10821947 is an equidigital number, since it uses as much as digits as its factorization.

10821947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 10821947 is about 3289.6727800801. The cubic root of 10821947 is about 221.1915172014.

The spelling of 10821947 in words is "ten million, eight hundred twenty-one thousand, nine hundred forty-seven".