1213802343 has 24 divisors (see below), whose sum is σ = 1923772032. Its totient is φ = 732858048.

The previous prime is 1213802333. The next prime is 1213802371. The reversal of 1213802343 is 3432083121.

It is not a de Polignac number, because 1213802343 - 2⁵ = 1213802311 is a prime.

It is a super-2 number, since 2×1213802343² = 2946632255744579298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213802333) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91671 + ... + 104072.

It is an arithmetic number, because the mean of its divisors is an integer number (80157168).

Almost surely, 2^1213802343 is an apocalyptic number.

1213802343 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1213802343 is a deficient number, since it is larger than the sum of its proper divisors (709969689).

1213802343 is a wasteful number, since it uses less digits than its factorization.

1213802343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195815 (or 195812 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1213802343 is about 34839.6662297445. Note that the first 3 decimals coincide. The cubic root of 1213802343 is about 1066.7172638868.

Adding to 1213802343 its reverse (3432083121), we get a palindrome (4645885464).

The spelling of 1213802343 in words is "one billion, two hundred thirteen million, eight hundred two thousand, three hundred forty-three".