1343694381 has 16 divisors (see below), whose sum is σ = 1855329600. Its totient is φ = 863993088.

The previous prime is 1343694311. The next prime is 1343694389. The reversal of 1343694381 is 1834963431.

It is not a de Polignac number, because 1343694381 - 2¹³ = 1343686189 is a prime.

It is a super-2 number, since 2×1343694381² = 3611029179061946322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1343694389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80130 + ... + 95436.

It is an arithmetic number, because the mean of its divisors is an integer number (115958100).

Almost surely, 2^1343694381 is an apocalyptic number.

It is an amenable number.

1343694381 is a deficient number, since it is larger than the sum of its proper divisors (511635219).

1343694381 is a wasteful number, since it uses less digits than its factorization.

1343694381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16348.

The product of its digits is 186624, while the sum is 42.

The square root of 1343694381 is about 36656.4371018243. The cubic root of 1343694381 is about 1103.4860154366.

The spelling of 1343694381 in words is "one billion, three hundred forty-three million, six hundred ninety-four thousand, three hundred eighty-one".