10209748949 has 2 divisors, whose sum is σ = 10209748950. Its totient is φ = 10209748948.

The previous prime is 10209748931. The next prime is 10209748979. The reversal of 10209748949 is 94984790201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9784770724 + 424978225 = 98918^2 + 20615^2 .

It is a cyclic number.

It is not a de Polignac number, because 10209748949 - 2⁸ = 10209748693 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 10209748949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10209748979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5104874474 + 5104874475.

It is an arithmetic number, because the mean of its divisors is an integer number (5104874475).

Almost surely, 2^10209748949 is an apocalyptic number.

It is an amenable number.

10209748949 is a deficient number, since it is larger than the sum of its proper divisors (1).

10209748949 is an equidigital number, since it uses as much as digits as its factorization.

10209748949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The spelling of 10209748949 in words is "ten billion, two hundred nine million, seven hundred forty-eight thousand, nine hundred forty-nine".