1349699609 has 4 divisors (see below), whose sum is σ = 1381088016. Its totient is φ = 1318311204.

The previous prime is 1349699597. The next prime is 1349699647. The reversal of 1349699609 is 9069969431.

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 1349699609 - 2²⁰ = 1348651033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1349699009) 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, 15694139 + ... + 15694224.

It is an arithmetic number, because the mean of its divisors is an integer number (345272004).

Almost surely, 2^1349699609 is an apocalyptic number.

It is an amenable number.

1349699609 is a deficient number, since it is larger than the sum of its proper divisors (31388407).

1349699609 is an equidigital number, since it uses as much as digits as its factorization.

1349699609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31388406.

The product of its (nonzero) digits is 2834352, while the sum is 56.

The square root of 1349699609 is about 36738.2581105855. The cubic root of 1349699609 is about 1105.1274694442.

The spelling of 1349699609 in words is "one billion, three hundred forty-nine million, six hundred ninety-nine thousand, six hundred nine".