1343417821 has 4 divisors (see below), whose sum is σ = 1343628000. Its totient is φ = 1343207644.

The previous prime is 1343417797. The next prime is 1343417839. The reversal of 1343417821 is 1287143431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1343417821 - 2⁷ = 1343417693 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 (1343417861) 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, 95191 + ... + 108388.

It is an arithmetic number, because the mean of its divisors is an integer number (335907000).

Almost surely, 2^1343417821 is an apocalyptic number.

It is an amenable number.

1343417821 is a deficient number, since it is larger than the sum of its proper divisors (210179).

1343417821 is an equidigital number, since it uses as much as digits as its factorization.

1343417821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210178.

The product of its digits is 16128, while the sum is 34.

The square root of 1343417821 is about 36652.6645825375. The cubic root of 1343417821 is about 1103.4103035196.

The spelling of 1343417821 in words is "one billion, three hundred forty-three million, four hundred seventeen thousand, eight hundred twenty-one".