1813297 has 4 divisors (see below), whose sum is σ = 1892160. Its totient is φ = 1734436.

The previous prime is 1813291. The next prime is 1813313. The reversal of 1813297 is 7923181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7923181 = 7 ⋅1131883.

It is a cyclic number.

It is not a de Polignac number, because 1813297 - 2¹⁹ = 1289009 is a prime.

It is an Ulam number.

It is a Duffinian number.

1813297 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1813291) 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, 39397 + ... + 39442.

It is an arithmetic number, because the mean of its divisors is an integer number (473040).

2^1813297 is an apocalyptic number.

It is an amenable number.

1813297 is a deficient number, since it is larger than the sum of its proper divisors (78863).

1813297 is an equidigital number, since it uses as much as digits as its factorization.

1813297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78862.

The product of its digits is 3024, while the sum is 31.

The square root of 1813297 is about 1346.5871676204. The cubic root of 1813297 is about 121.9428425261.

The spelling of 1813297 in words is "one million, eight hundred thirteen thousand, two hundred ninety-seven".