1340148009 has 4 divisors (see below), whose sum is σ = 1786864016. Its totient is φ = 893432004.

The previous prime is 1340148001. The next prime is 1340148013. The reversal of 1340148009 is 9008410431.

It is a happy number.

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 not a de Polignac number, because 1340148009 - 2³ = 1340148001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340148001) 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, 223357999 + ... + 223358004.

It is an arithmetic number, because the mean of its divisors is an integer number (446716004).

Almost surely, 2^1340148009 is an apocalyptic number.

It is an amenable number.

1340148009 is a deficient number, since it is larger than the sum of its proper divisors (446716007).

1340148009 is an equidigital number, since it uses as much as digits as its factorization.

1340148009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446716006.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1340148009 is about 36608.0320285043. The cubic root of 1340148009 is about 1102.5143610102.

The spelling of 1340148009 in words is "one billion, three hundred forty million, one hundred forty-eight thousand, nine".