1010857949 has 2 divisors, whose sum is σ = 1010857950. Its totient is φ = 1010857948.

The previous prime is 1010857943. The next prime is 1010857957. The reversal of 1010857949 is 9497580101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 637209049 + 373648900 = 25243^2 + 19330^2 .

It is a cyclic number.

It is not a de Polignac number, because 1010857949 - 2¹² = 1010853853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1010857943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505428974 + 505428975.

It is an arithmetic number, because the mean of its divisors is an integer number (505428975).

Almost surely, 2^1010857949 is an apocalyptic number.

It is an amenable number.

1010857949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1010857949 is an equidigital number, since it uses as much as digits as its factorization.

1010857949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 1010857949 is about 31793.9923413213. The cubic root of 1010857949 is about 1003.6062953336.

The spelling of 1010857949 in words is "one billion, ten million, eight hundred fifty-seven thousand, nine hundred forty-nine".