1002856949 has 2 divisors, whose sum is σ = 1002856950. Its totient is φ = 1002856948.

The previous prime is 1002856853. The next prime is 1002856951. The reversal of 1002856949 is 9496582001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 994960849 + 7896100 = 31543^2 + 2810^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002856949 - 2⁸ = 1002856693 is a prime.

Together with 1002856951, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1002856969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501428474 + 501428475.

It is an arithmetic number, because the mean of its divisors is an integer number (501428475).

Almost surely, 2^1002856949 is an apocalyptic number.

It is an amenable number.

1002856949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002856949 is an equidigital number, since it uses as much as digits as its factorization.

1002856949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 1002856949 is about 31667.9167139236. The cubic root of 1002856949 is about 1000.9514108636.

The spelling of 1002856949 in words is "one billion, two million, eight hundred fifty-six thousand, nine hundred forty-nine".