1002938857 has 2 divisors, whose sum is σ = 1002938858. Its totient is φ = 1002938856.

The previous prime is 1002938819. The next prime is 1002938863. The reversal of 1002938857 is 7588392001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 966650281 + 36288576 = 31091^2 + 6024^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002938857 is a prime.

It is not a weakly prime, because it can be changed into another prime (1002938357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501469428 + 501469429.

It is an arithmetic number, because the mean of its divisors is an integer number (501469429).

Almost surely, 2^1002938857 is an apocalyptic number.

It is an amenable number.

1002938857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002938857 is an equidigital number, since it uses as much as digits as its factorization.

1002938857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 1002938857 is about 31669.2099206785. The cubic root of 1002938857 is about 1000.9786609104.

The spelling of 1002938857 in words is "one billion, two million, nine hundred thirty-eight thousand, eight hundred fifty-seven".