1816913 has 12 divisors (see below), whose sum is σ = 2194560. Its totient is φ = 1473336.

The previous prime is 1816901. The next prime is 1816933. The reversal of 1816913 is 3196181.

It is a happy number.

It is not a de Polignac number, because 1816913 - 2⁶ = 1816849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1816933) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2168 + ... + 2886.

It is an arithmetic number, because the mean of its divisors is an integer number (182880).

2^1816913 is an apocalyptic number.

It is an amenable number.

1816913 is a deficient number, since it is larger than the sum of its proper divisors (377647).

1816913 is an equidigital number, since it uses as much as digits as its factorization.

1816913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764 (or 745 counting only the distinct ones).

The product of its digits is 1296, while the sum is 29.

The square root of 1816913 is about 1347.9291524409. The cubic root of 1816913 is about 122.0238464539.

The spelling of 1816913 in words is "one million, eight hundred sixteen thousand, nine hundred thirteen".