9778249 has 16 divisors (see below), whose sum is σ = 11203920. Its totient is φ = 8467200.

The previous prime is 9778231. The next prime is 9778253. The reversal of 9778249 is 9428779.

It can be written as a sum of positive squares in 8 ways, for example, as 585225 + 9193024 = 765^2 + 3032^2 .

It is a cyclic number.

It is not a de Polignac number, because 9778249 - 2⁷ = 9778121 is a prime.

It is a super-2 number, since 2×9778249² = 191228307012002, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9778199 and 9778208.

It is not an unprimeable number, because it can be changed into a prime (9778259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13599 + ... + 14299.

It is an arithmetic number, because the mean of its divisors is an integer number (700245).

Almost surely, 2^9778249 is an apocalyptic number.

It is an amenable number.

9778249 is a deficient number, since it is larger than the sum of its proper divisors (1425671).

9778249 is a wasteful number, since it uses less digits than its factorization.

9778249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780.

The product of its digits is 254016, while the sum is 46.

The square root of 9778249 is about 3127.0191876610. The cubic root of 9778249 is about 213.8390570842.

The spelling of 9778249 in words is "nine million, seven hundred seventy-eight thousand, two hundred forty-nine".