1340002739 has 4 divisors (see below), whose sum is σ = 1386209760. Its totient is φ = 1293795720.

The previous prime is 1340002723. The next prime is 1340002777. The reversal of 1340002739 is 9372000431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1340002739 - 2⁴ = 1340002723 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 46206991 = 1340002739 / (1 + 3 + 4 + 0 + 0 + 0 + 2 + 7 + 3 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340002789) 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, 23103467 + ... + 23103524.

It is an arithmetic number, because the mean of its divisors is an integer number (346552440).

Almost surely, 2^1340002739 is an apocalyptic number.

1340002739 is a deficient number, since it is larger than the sum of its proper divisors (46207021).

1340002739 is an equidigital number, since it uses as much as digits as its factorization.

1340002739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46207020.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 1340002739 is about 36606.0478473162. The cubic root of 1340002739 is about 1102.4745226123.

The spelling of 1340002739 in words is "one billion, three hundred forty million, two thousand, seven hundred thirty-nine".