1813207 has 4 divisors (see below), whose sum is σ = 1978056. Its totient is φ = 1648360.

The previous prime is 1813177. The next prime is 1813211. The reversal of 1813207 is 7023181.

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

It is a cyclic number.

It is not a de Polignac number, because 1813207 - 2¹⁵ = 1780439 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 (1813277) 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, 82408 + ... + 82429.

It is an arithmetic number, because the mean of its divisors is an integer number (494514).

2^1813207 is an apocalyptic number.

1813207 is a deficient number, since it is larger than the sum of its proper divisors (164849).

1813207 is a wasteful number, since it uses less digits than its factorization.

1813207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164848.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 1813207 is about 1346.5537493914. The cubic root of 1813207 is about 121.9408250155.

Adding to 1813207 its reverse (7023181), we get a palindrome (8836388).

It can be divided in two parts, 18 and 13207, that added together give a square (13225 = 115²).

The spelling of 1813207 in words is "one million, eight hundred thirteen thousand, two hundred seven".