1213893 has 8 divisors (see below), whose sum is σ = 1798400. Its totient is φ = 809244.

The previous prime is 1213879. The next prime is 1213897. The reversal of 1213893 is 3983121.

It is not a de Polignac number, because 1213893 - 2⁶ = 1213829 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 44959 = 1213893 / (1 + 2 + 1 + 3 + 8 + 9 + 3).

It is a Duffinian number.

1213893 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22453 + ... + 22506.

It is an arithmetic number, because the mean of its divisors is an integer number (224800).

2^1213893 is an apocalyptic number.

It is an amenable number.

1213893 is a deficient number, since it is larger than the sum of its proper divisors (584507).

1213893 is an equidigital number, since it uses as much as digits as its factorization.

1213893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44968 (or 44962 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 1213893 is about 1101.7681244255. The cubic root of 1213893 is about 106.6743820374.

The spelling of 1213893 in words is "one million, two hundred thirteen thousand, eight hundred ninety-three".