1340873693 has 4 divisors (see below), whose sum is σ = 1341060000. Its totient is φ = 1340687388.

The previous prime is 1340873683. The next prime is 1340873713. The reversal of 1340873693 is 3963780431.

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 1340873693 - 2⁸ = 1340873437 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 (1340873683) 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, 81905 + ... + 96902.

It is an arithmetic number, because the mean of its divisors is an integer number (335265000).

Almost surely, 2^1340873693 is an apocalyptic number.

It is an amenable number.

1340873693 is a deficient number, since it is larger than the sum of its proper divisors (186307).

1340873693 is an equidigital number, since it uses as much as digits as its factorization.

1340873693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186306.

The product of its (nonzero) digits is 326592, while the sum is 44.

The square root of 1340873693 is about 36617.9422278205. The cubic root of 1340873693 is about 1102.7133272579.

The spelling of 1340873693 in words is "one billion, three hundred forty million, eight hundred seventy-three thousand, six hundred ninety-three".