1349967691 has 4 divisors (see below), whose sum is σ = 1355100912. Its totient is φ = 1344834472.

The previous prime is 1349967683. The next prime is 1349967737. The reversal of 1349967691 is 1967699431.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1967699431 = 21433 ⋅91807.

It is a cyclic number.

It is not a de Polignac number, because 1349967691 - 2³ = 1349967683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1349967191) 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, 2566216 + ... + 2566741.

It is an arithmetic number, because the mean of its divisors is an integer number (338775228).

Almost surely, 2^1349967691 is an apocalyptic number.

1349967691 is a deficient number, since it is larger than the sum of its proper divisors (5133221).

1349967691 is an equidigital number, since it uses as much as digits as its factorization.

1349967691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5133220.

The product of its digits is 2204496, while the sum is 55.

The square root of 1349967691 is about 36741.9064693165. The cubic root of 1349967691 is about 1105.2006326793.

The spelling of 1349967691 in words is "one billion, three hundred forty-nine million, nine hundred sixty-seven thousand, six hundred ninety-one".