821472143 has 2 divisors, whose sum is σ = 821472144. Its totient is φ = 821472142.

The previous prime is 821472137. The next prime is 821472149. The reversal of 821472143 is 341274128.

It is a balanced prime because it is at equal distance from previous prime (821472137) and next prime (821472149).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-821472143 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (821472149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410736071 + 410736072.

It is an arithmetic number, because the mean of its divisors is an integer number (410736072).

Almost surely, 2^821472143 is an apocalyptic number.

821472143 is a deficient number, since it is larger than the sum of its proper divisors (1).

821472143 is an equidigital number, since it uses as much as digits as its factorization.

821472143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 32.

The square root of 821472143 is about 28661.3353317671. The cubic root of 821472143 is about 936.5499540217.

The spelling of 821472143 in words is "eight hundred twenty-one million, four hundred seventy-two thousand, one hundred forty-three".