1098200961 has 36 divisors (see below), whose sum is σ = 1877756244. Its totient is φ = 614370240.

The previous prime is 1098200921. The next prime is 1098200963. The reversal of 1098200961 is 1690028901.

It can be written as a sum of positive squares in 2 ways, for example, as 696960000 + 401240961 = 26400^2 + 20031^2 .

It is not a de Polignac number, because 1098200961 - 2¹⁰ = 1098199937 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098200963) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 24630 + ... + 52943.

Almost surely, 2^1098200961 is an apocalyptic number.

1098200961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1098200961 is a deficient number, since it is larger than the sum of its proper divisors (779555283).

1098200961 is a wasteful number, since it uses less digits than its factorization.

1098200961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77614 (or 77600 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 1098200961 is about 33139.1152718355. The cubic root of 1098200961 is about 1031.7170471118.

The spelling of 1098200961 in words is "one billion, ninety-eight million, two hundred thousand, nine hundred sixty-one".