1826397 has 6 divisors (see below), whose sum is σ = 2638142. Its totient is φ = 1217592.

The previous prime is 1826389. The next prime is 1826399. The reversal of 1826397 is 7936281.

1826397 is a `hidden beast` number, since 18 + 2 + 639 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1758276 + 68121 = 1326^2 + 261^2 .

It is not a de Polignac number, because 1826397 - 2³ = 1826389 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1826399) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 101458 + ... + 101475.

2^1826397 is an apocalyptic number.

It is an amenable number.

1826397 is a deficient number, since it is larger than the sum of its proper divisors (811745).

1826397 is a wasteful number, since it uses less digits than its factorization.

1826397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202939 (or 202936 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 1826397 is about 1351.4425625975. The cubic root of 1826397 is about 122.2357931977.

The spelling of 1826397 in words is "one million, eight hundred twenty-six thousand, three hundred ninety-seven".