1002856853 has 2 divisors, whose sum is σ = 1002856854. Its totient is φ = 1002856852.

The previous prime is 1002856823. The next prime is 1002856949. The reversal of 1002856853 is 3586582001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 990864484 + 11992369 = 31478^2 + 3463^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002856853 - 2¹⁰ = 1002855829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1002856823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501428426 + 501428427.

It is an arithmetic number, because the mean of its divisors is an integer number (501428427).

Almost surely, 2^1002856853 is an apocalyptic number.

It is an amenable number.

1002856853 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002856853 is an equidigital number, since it uses as much as digits as its factorization.

1002856853 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 1002856853 is about 31667.9151981939. The cubic root of 1002856853 is about 1000.9513789244.

The spelling of 1002856853 in words is "one billion, two million, eight hundred fifty-six thousand, eight hundred fifty-three".