1340405099 has 4 divisors (see below), whose sum is σ = 1462260120. Its totient is φ = 1218550080.

The previous prime is 1340405083. The next prime is 1340405111. The reversal of 1340405099 is 9905040431.

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

It is not a de Polignac number, because 1340405099 - 2⁴ = 1340405083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340405039) 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, 60927494 + ... + 60927515.

It is an arithmetic number, because the mean of its divisors is an integer number (365565030).

Almost surely, 2^1340405099 is an apocalyptic number.

1340405099 is a deficient number, since it is larger than the sum of its proper divisors (121855021).

1340405099 is a wasteful number, since it uses less digits than its factorization.

1340405099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121855020.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 1340405099 is about 36611.5432479976. The cubic root of 1340405099 is about 1102.5848575255.

The spelling of 1340405099 in words is "one billion, three hundred forty million, four hundred five thousand, ninety-nine".