1098897 has 16 divisors (see below), whose sum is σ = 1607040. Its totient is φ = 664832.

The previous prime is 1098847. The next prime is 1098953. The reversal of 1098897 is 7988901.

1098897 is nontrivially palindromic in base 5.

It is a cyclic number.

It is not a de Polignac number, because 1098897 - 2⁶ = 1098833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1098847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1108 + ... + 1850.

It is an arithmetic number, because the mean of its divisors is an integer number (100440).

2^1098897 is an apocalyptic number.

1098897 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1098897 is a deficient number, since it is larger than the sum of its proper divisors (508143).

1098897 is a wasteful number, since it uses less digits than its factorization.

1098897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792.

The product of its (nonzero) digits is 36288, while the sum is 42.

The square root of 1098897 is about 1048.2828816689. The cubic root of 1098897 is about 103.1934968260.

It can be divided in two parts, 1098 and 897, that multiplied together give a triangular number (984906 = T₁₄₀₃).

The spelling of 1098897 in words is "one million, ninety-eight thousand, eight hundred ninety-seven".