9888910249 has 9 divisors (see below), whose sum is σ = 9952461687. Its totient is φ = 9825763944.

The previous prime is 9888910231. The next prime is 9888910267. The reversal of 9888910249 is 9420198889.

The square root of 9888910249 is 99443.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (9888910231) and next prime (9888910267).

It can be written as a sum of positive squares in only one way, i.e., 1704451225 + 8184459024 = 41285^2 + 90468^2 .

It is not a de Polignac number, because 9888910249 - 2¹¹ = 9888908201 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9888910193 and 9888910202.

It is not an unprimeable number, because it can be changed into a prime (9888910219) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 27545532 + ... + 27545890.

Almost surely, 2^9888910249 is an apocalyptic number.

9888910249 is the 99443-rd square number.

9888910249 is the 49722-nd centered octagonal number.

It is an amenable number.

9888910249 is a deficient number, since it is larger than the sum of its proper divisors (63551438).

9888910249 is an frugal number, since it uses more digits than its factorization.

9888910249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272 (or 636 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 58.

The cubic root of 9888910249 is about 2146.4271106463.

The spelling of 9888910249 in words is "nine billion, eight hundred eighty-eight million, nine hundred ten thousand, two hundred forty-nine".