1340039429 has 4 divisors (see below), whose sum is σ = 1410567840. Its totient is φ = 1269511020.

The previous prime is 1340039423. The next prime is 1340039461. The reversal of 1340039429 is 9249300431.

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 1340039429 - 2⁴ = 1340039413 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 (1340039423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35264177 + ... + 35264214.

It is an arithmetic number, because the mean of its divisors is an integer number (352641960).

Almost surely, 2^1340039429 is an apocalyptic number.

1340039429 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1340039429 is a deficient number, since it is larger than the sum of its proper divisors (70528411).

1340039429 is an equidigital number, since it uses as much as digits as its factorization.

1340039429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70528410.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 1340039429 is about 36606.5489905836. The cubic root of 1340039429 is about 1102.4845846368.

The spelling of 1340039429 in words is "one billion, three hundred forty million, thirty-nine thousand, four hundred twenty-nine".