1343828581 has 4 divisors (see below), whose sum is σ = 1363885792. Its totient is φ = 1323771372.

The previous prime is 1343828543. The next prime is 1343828677. The reversal of 1343828581 is 1858283431.

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 1343828581 - 2¹³ = 1343820389 is a prime.

It is a super-2 number, since 2×1343828581² = 3611750510224947122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1343828501) 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, 10028505 + ... + 10028638.

It is an arithmetic number, because the mean of its divisors is an integer number (340971448).

Almost surely, 2^1343828581 is an apocalyptic number.

It is an amenable number.

1343828581 is a deficient number, since it is larger than the sum of its proper divisors (20057211).

1343828581 is an equidigital number, since it uses as much as digits as its factorization.

1343828581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20057210.

The product of its digits is 184320, while the sum is 43.

The square root of 1343828581 is about 36658.2675668123. The cubic root of 1343828581 is about 1103.5227506981.

The spelling of 1343828581 in words is "one billion, three hundred forty-three million, eight hundred twenty-eight thousand, five hundred eighty-one".