1097213 has 4 divisors (see below), whose sum is σ = 1181628. Its totient is φ = 1012800.

The previous prime is 1097209. The next prime is 1097221. The reversal of 1097213 is 3127901.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 91204 + 1006009 = 302^2 + 1003^2 .

It is a cyclic number.

It is not a de Polignac number, because 1097213 - 2² = 1097209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1097203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42188 + ... + 42213.

It is an arithmetic number, because the mean of its divisors is an integer number (295407).

2^1097213 is an apocalyptic number.

1097213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1097213 is a deficient number, since it is larger than the sum of its proper divisors (84415).

1097213 is an equidigital number, since it uses as much as digits as its factorization.

1097213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84414.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 1097213 is about 1047.4793554052. The cubic root of 1097213 is about 103.1407570658.

The spelling of 1097213 in words is "one million, ninety-seven thousand, two hundred thirteen".