1340688071 has 4 divisors (see below), whose sum is σ = 1341062352. Its totient is φ = 1340313792.

The previous prime is 1340688059. The next prime is 1340688077. The reversal of 1340688071 is 1708860431.

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 1340688071 - 2¹⁴ = 1340671687 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 (1340688077) 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, 181715 + ... + 188948.

It is an arithmetic number, because the mean of its divisors is an integer number (335265588).

Almost surely, 2^1340688071 is an apocalyptic number.

1340688071 is a deficient number, since it is larger than the sum of its proper divisors (374281).

1340688071 is an equidigital number, since it uses as much as digits as its factorization.

1340688071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374280.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 1340688071 is about 36615.4075629372. The cubic root of 1340688071 is about 1102.6624407103.

The spelling of 1340688071 in words is "one billion, three hundred forty million, six hundred eighty-eight thousand, seventy-one".