1213993 has 12 divisors (see below), whose sum is σ = 1361920. Its totient is φ = 1081080.

The previous prime is 1213981. The next prime is 1214011. The reversal of 1213993 is 3993121.

It is not a de Polignac number, because 1213993 - 2⁹ = 1213481 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

1213993 is a modest number, since divided by 3993 gives 121 as remainder.

1213993 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213913) 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, 9496 + ... + 9622.

2^1213993 is an apocalyptic number.

It is an amenable number.

1213993 is a deficient number, since it is larger than the sum of its proper divisors (147927).

1213993 is a wasteful number, since it uses less digits than its factorization.

1213993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228 (or 217 counting only the distinct ones).

The product of its digits is 1458, while the sum is 28.

The square root of 1213993 is about 1101.8135050906. The cubic root of 1213993 is about 106.6773112207.

It can be divided in two parts, 121 and 3993, that added together give a palindrome (4114).

The spelling of 1213993 in words is "one million, two hundred thirteen thousand, nine hundred ninety-three".